diff --git a/src/modules/documents/entities/access-log.entity.ts b/src/modules/documents/entities/access-log.entity.ts
index 50e5a84..ce2084a 100644
--- a/src/modules/documents/entities/access-log.entity.ts
+++ b/src/modules/documents/entities/access-log.entity.ts
@@ -15,6 +15,7 @@ import {
 } from 'typeorm';
 import { Document } from './document.entity';
 import { DocumentVersion } from './document-version.entity';
+import { User } from '../../core/entities/user.entity';
 
 @Entity('access_logs', { schema: 'documents' })
 @Index(['tenantId'])
@@ -73,4 +74,9 @@ export class AccessLog {
   // Timestamp
   @Column({ name: 'accessed_at', type: 'timestamptz', default: () => 'NOW()' })
   accessedAt!: Date;
+
+  // FK a auth.users (ERP-Core) - usuario que accedió
+  @ManyToOne(() => User, { nullable: true })
+  @JoinColumn({ name: 'user_id' })
+  user?: User;
 }
diff --git a/src/modules/documents/entities/document-share.entity.ts b/src/modules/documents/entities/document-share.entity.ts
index 7770541..d3877bf 100644
--- a/src/modules/documents/entities/document-share.entity.ts
+++ b/src/modules/documents/entities/document-share.entity.ts
@@ -16,6 +16,7 @@ import {
 } from 'typeorm';
 import { Document } from './document.entity';
 import { DocumentVersion } from './document-version.entity';
+import { User } from '../../core/entities/user.entity';
 
 @Entity('document_shares', { schema: 'documents' })
 @Index(['tenantId'])
@@ -107,4 +108,14 @@ export class DocumentShare {
 
   @Column({ name: 'last_accessed_at', type: 'timestamptz', nullable: true })
   lastAccessedAt?: Date;
+
+  // FK a auth.users (ERP-Core) - usuario que compartió
+  @ManyToOne(() => User, { nullable: false })
+  @JoinColumn({ name: 'shared_by_id' })
+  sharedBy!: User;
+
+  // FK a auth.users (ERP-Core) - usuario que revocó (si aplica)
+  @ManyToOne(() => User, { nullable: true })
+  @JoinColumn({ name: 'revoked_by_id' })
+  revokedBy?: User;
 }
diff --git a/src/modules/hse/entities/epp-inventario.entity.ts b/src/modules/hse/entities/epp-inventario.entity.ts
index a507b0f..3f245b6 100644
--- a/src/modules/hse/entities/epp-inventario.entity.ts
+++ b/src/modules/hse/entities/epp-inventario.entity.ts
@@ -18,6 +18,7 @@ import {
 } from 'typeorm';
 import { Tenant } from '../../core/entities/tenant.entity';
 import { EppCatalogo } from './epp-catalogo.entity';
+import { AlmacenTemporal } from './almacen-temporal.entity';
 
 @Entity({ schema: 'hse', name: 'epp_inventario' })
 export class EppInventario {
@@ -59,4 +60,9 @@ export class EppInventario {
   @ManyToOne(() => EppCatalogo)
   @JoinColumn({ name: 'epp_id' })
   epp: EppCatalogo;
+
+  // FK a hse.almacen_temporal - ubicación del inventario de EPP
+  @ManyToOne(() => AlmacenTemporal, { nullable: true })
+  @JoinColumn({ name: 'almacen_id' })
+  almacen: AlmacenTemporal;
 }
diff --git a/src/modules/hse/entities/epp-movimiento.entity.ts b/src/modules/hse/entities/epp-movimiento.entity.ts
index 3bf0c1c..6294f96 100644
--- a/src/modules/hse/entities/epp-movimiento.entity.ts
+++ b/src/modules/hse/entities/epp-movimiento.entity.ts
@@ -19,6 +19,7 @@ import {
 import { Tenant } from '../../core/entities/tenant.entity';
 import { EppCatalogo } from './epp-catalogo.entity';
 import { User } from '../../core/entities/user.entity';
+import { AlmacenTemporal } from './almacen-temporal.entity';
 
 export type TipoMovimientoEpp = 'entrada' | 'salida' | 'transferencia' | 'ajuste';
 
@@ -72,4 +73,14 @@ export class EppMovimiento {
   @ManyToOne(() => User)
   @JoinColumn({ name: 'created_by' })
   createdBy: User;
+
+  // FK a hse.almacen_temporal - almacén origen (para transferencias y salidas)
+  @ManyToOne(() => AlmacenTemporal, { nullable: true })
+  @JoinColumn({ name: 'almacen_origen_id' })
+  almacenOrigen: AlmacenTemporal;
+
+  // FK a hse.almacen_temporal - almacén destino (para transferencias y entradas)
+  @ManyToOne(() => AlmacenTemporal, { nullable: true })
+  @JoinColumn({ name: 'almacen_destino_id' })
+  almacenDestino: AlmacenTemporal;
 }
diff --git a/src/modules/inventory/entities/almacen-proyecto.entity.ts b/src/modules/inventory/entities/almacen-proyecto.entity.ts
index 2184976..81f7283 100644
--- a/src/modules/inventory/entities/almacen-proyecto.entity.ts
+++ b/src/modules/inventory/entities/almacen-proyecto.entity.ts
@@ -20,6 +20,7 @@ import {
 import { Tenant } from '../../core/entities/tenant.entity';
 import { User } from '../../core/entities/user.entity';
 import { Fraccionamiento } from '../../construction/entities/fraccionamiento.entity';
+import { Warehouse } from '../../warehouses/entities/warehouse.entity';
 
 export type WarehouseTypeConstruction = 'central' | 'obra' | 'temporal' | 'transito';
 
@@ -89,4 +90,9 @@ export class AlmacenProyecto {
   @ManyToOne(() => User)
   @JoinColumn({ name: 'created_by' })
   createdBy: User;
+
+  // FK a inventory.warehouses (ERP-Core)
+  @ManyToOne(() => Warehouse, { nullable: false })
+  @JoinColumn({ name: 'warehouse_id' })
+  warehouse: Warehouse;
 }
diff --git a/src/modules/inventory/entities/consumo-obra.entity.ts b/src/modules/inventory/entities/consumo-obra.entity.ts
index 8d257f1..9cc1b37 100644
--- a/src/modules/inventory/entities/consumo-obra.entity.ts
+++ b/src/modules/inventory/entities/consumo-obra.entity.ts
@@ -21,6 +21,7 @@ import { User } from '../../core/entities/user.entity';
 import { Fraccionamiento } from '../../construction/entities/fraccionamiento.entity';
 import { Lote } from '../../construction/entities/lote.entity';
 import { Concepto } from '../../budgets/entities/concepto.entity';
+import { Product } from '../../products/entities/product.entity';
 
 @Entity({ schema: 'inventory', name: 'consumos_obra' })
 export class ConsumoObra {
@@ -110,4 +111,11 @@ export class ConsumoObra {
   @ManyToOne(() => User)
   @JoinColumn({ name: 'created_by' })
   createdBy: User;
+
+  // FK a products.products (ERP-Core)
+  @ManyToOne(() => Product, { nullable: false })
+  @JoinColumn({ name: 'product_id' })
+  product: Product;
+
+  // NOTA: stockMoveId no tiene relación aún - StockMove entity pendiente de crear
 }
diff --git a/src/modules/inventory/entities/requisicion-linea.entity.ts b/src/modules/inventory/entities/requisicion-linea.entity.ts
index 126826c..6c107cd 100644
--- a/src/modules/inventory/entities/requisicion-linea.entity.ts
+++ b/src/modules/inventory/entities/requisicion-linea.entity.ts
@@ -21,6 +21,8 @@ import { User } from '../../core/entities/user.entity';
 import { RequisicionObra } from './requisicion-obra.entity';
 import { Concepto } from '../../budgets/entities/concepto.entity';
 import { Lote } from '../../construction/entities/lote.entity';
+import { Product } from '../../products/entities/product.entity';
+import { Uom } from '../../core/entities/uom.entity';
 
 @Entity({ schema: 'inventory', name: 'requisicion_lineas' })
 export class RequisicionLinea {
@@ -112,4 +114,14 @@ export class RequisicionLinea {
   @ManyToOne(() => User)
   @JoinColumn({ name: 'created_by' })
   createdBy: User;
+
+  // FK a products.products (ERP-Core)
+  @ManyToOne(() => Product, { nullable: false })
+  @JoinColumn({ name: 'product_id' })
+  product: Product;
+
+  // FK a core.uom (ERP-Core)
+  @ManyToOne(() => Uom, { nullable: true })
+  @JoinColumn({ name: 'unit_id' })
+  unit: Uom;
 }
diff --git a/src/modules/inventory/entities/requisicion-obra.entity.ts b/src/modules/inventory/entities/requisicion-obra.entity.ts
index c939fd7..ec54d05 100644
--- a/src/modules/inventory/entities/requisicion-obra.entity.ts
+++ b/src/modules/inventory/entities/requisicion-obra.entity.ts
@@ -22,6 +22,7 @@ import { Tenant } from '../../core/entities/tenant.entity';
 import { User } from '../../core/entities/user.entity';
 import { Fraccionamiento } from '../../construction/entities/fraccionamiento.entity';
 import { RequisicionLinea } from './requisicion-linea.entity';
+import { Warehouse } from '../../warehouses/entities/warehouse.entity';
 
 export type RequisitionStatus = 'draft' | 'submitted' | 'approved' | 'partially_served' | 'served' | 'cancelled';
 
@@ -114,4 +115,9 @@ export class RequisicionObra {
 
   @OneToMany(() => RequisicionLinea, (linea) => linea.requisicion)
   lineas: RequisicionLinea[];
+
+  // FK a inventory.warehouses (ERP-Core) - destino de la requisición
+  @ManyToOne(() => Warehouse, { nullable: true })
+  @JoinColumn({ name: 'destination_warehouse_id' })
+  destinationWarehouse: Warehouse;
 }
diff --git a/src/modules/purchase/entities/comparativo-cotizaciones.entity.ts b/src/modules/purchase/entities/comparativo-cotizaciones.entity.ts
index 5e989bf..09aa5f4 100644
--- a/src/modules/purchase/entities/comparativo-cotizaciones.entity.ts
+++ b/src/modules/purchase/entities/comparativo-cotizaciones.entity.ts
@@ -22,6 +22,7 @@ import { Tenant } from '../../core/entities/tenant.entity';
 import { User } from '../../core/entities/user.entity';
 import { RequisicionObra } from '../../inventory/entities/requisicion-obra.entity';
 import { ComparativoProveedor } from './comparativo-proveedor.entity';
+import { Partner } from '../../partners/entities/partner.entity';
 
 export type ComparativoStatus = 'draft' | 'in_evaluation' | 'approved' | 'cancelled';
 
@@ -98,4 +99,9 @@ export class ComparativoCotizaciones {
 
   @OneToMany(() => ComparativoProveedor, (cp) => cp.comparativo)
   proveedores: ComparativoProveedor[];
+
+  // FK a partners.partners (ERP-Core) - proveedor ganador
+  @ManyToOne(() => Partner, { nullable: true })
+  @JoinColumn({ name: 'winner_supplier_id' })
+  winnerSupplier: Partner;
 }
diff --git a/src/modules/purchase/entities/comparativo-producto.entity.ts b/src/modules/purchase/entities/comparativo-producto.entity.ts
index f6e9640..a5cb031 100644
--- a/src/modules/purchase/entities/comparativo-producto.entity.ts
+++ b/src/modules/purchase/entities/comparativo-producto.entity.ts
@@ -19,6 +19,7 @@ import {
 import { Tenant } from '../../core/entities/tenant.entity';
 import { User } from '../../core/entities/user.entity';
 import { ComparativoProveedor } from './comparativo-proveedor.entity';
+import { Product } from '../../products/entities/product.entity';
 
 @Entity({ schema: 'purchase', name: 'comparativo_productos' })
 export class ComparativoProducto {
@@ -72,4 +73,9 @@ export class ComparativoProducto {
   @ManyToOne(() => User)
   @JoinColumn({ name: 'created_by' })
   createdBy: User;
+
+  // FK a products.products (ERP-Core)
+  @ManyToOne(() => Product, { nullable: false })
+  @JoinColumn({ name: 'product_id' })
+  product: Product;
 }
diff --git a/src/modules/purchase/entities/comparativo-proveedor.entity.ts b/src/modules/purchase/entities/comparativo-proveedor.entity.ts
index 8a00104..b2bd432 100644
--- a/src/modules/purchase/entities/comparativo-proveedor.entity.ts
+++ b/src/modules/purchase/entities/comparativo-proveedor.entity.ts
@@ -21,6 +21,7 @@ import { Tenant } from '../../core/entities/tenant.entity';
 import { User } from '../../core/entities/user.entity';
 import { ComparativoCotizaciones } from './comparativo-cotizaciones.entity';
 import { ComparativoProducto } from './comparativo-producto.entity';
+import { Partner } from '../../partners/entities/partner.entity';
 
 @Entity({ schema: 'purchase', name: 'comparativo_proveedores' })
 export class ComparativoProveedor {
@@ -84,4 +85,9 @@ export class ComparativoProveedor {
 
   @OneToMany(() => ComparativoProducto, (cp) => cp.comparativoProveedor)
   productos: ComparativoProducto[];
+
+  // FK a partners.partners (ERP-Core) - proveedor participante
+  @ManyToOne(() => Partner, { nullable: false })
+  @JoinColumn({ name: 'supplier_id' })
+  supplier: Partner;
 }
diff --git a/src/modules/purchase/entities/supplier-construction.entity.ts b/src/modules/purchase/entities/supplier-construction.entity.ts
index 6104a47..0d6e2e3 100644
--- a/src/modules/purchase/entities/supplier-construction.entity.ts
+++ b/src/modules/purchase/entities/supplier-construction.entity.ts
@@ -19,6 +19,7 @@ import {
 } from 'typeorm';
 import { Tenant } from '../../core/entities/tenant.entity';
 import { User } from '../../core/entities/user.entity';
+import { Partner } from '../../partners/entities/partner.entity';
 
 @Entity({ schema: 'purchase', name: 'supplier_construction' })
 @Index(['tenantId'])
@@ -127,4 +128,9 @@ export class SupplierConstruction {
     if (ratings.length === 0) return 0;
     return ratings.reduce((sum, r) => sum + Number(r), 0) / ratings.length;
   }
+
+  // FK a partners.partners (ERP-Core) - el proveedor como partner
+  @ManyToOne(() => Partner, { nullable: false })
+  @JoinColumn({ name: 'supplier_id' })
+  supplier: Partner;
 }