[MCH-006] feat: Agregar schema SQL para onboarding inteligente

- Crear ENUMs: onboarding_status, onboarding_channel, scan_type, scan_status
- Crear tabla auth.onboarding_sessions para sesiones de configuracion
- Crear tabla catalog.product_scans para resultados OCR/audio
- Agregar indices para queries frecuentes
- Trigger para updated_at automatico

Sprint 5 - Modulo Onboarding Inteligente

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

schemas/onboarding.sql

@@ -0,0 +1,155 @@
+-- =====================================================
+-- SCHEMA: Onboarding Inteligente
+-- Epica: MCH-006 - Onboarding Inteligente
+-- Fecha: 2026-01-18
+-- =====================================================
+
+-- ENUM: Onboarding Status
+DO $$ BEGIN
+    CREATE TYPE onboarding_status AS ENUM (
+        'started',
+        'business_info',
+        'giro_selected',
+        'templates_loaded',
+        'products_added',
+        'completed',
+        'abandoned'
+    );
+EXCEPTION
+    WHEN duplicate_object THEN null;
+END $$;
+
+-- ENUM: Onboarding Channel
+DO $$ BEGIN
+    CREATE TYPE onboarding_channel AS ENUM (
+        'whatsapp',
+        'web',
+        'app'
+    );
+EXCEPTION
+    WHEN duplicate_object THEN null;
+END $$;
+
+-- ENUM: Scan Type
+DO $$ BEGIN
+    CREATE TYPE scan_type AS ENUM (
+        'photo',
+        'audio',
+        'barcode'
+    );
+EXCEPTION
+    WHEN duplicate_object THEN null;
+END $$;
+
+-- ENUM: Scan Status
+DO $$ BEGIN
+    CREATE TYPE scan_status AS ENUM (
+        'pending',
+        'processing',
+        'detected',
+        'confirmed',
+        'rejected',
+        'failed'
+    );
+EXCEPTION
+    WHEN duplicate_object THEN null;
+END $$;
+
+-- TABLA: onboarding_sessions
+CREATE TABLE IF NOT EXISTS auth.onboarding_sessions (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    tenant_id UUID REFERENCES auth.tenants(id) ON DELETE SET NULL,
+    phone_number VARCHAR(20) NOT NULL,
+    channel onboarding_channel DEFAULT 'whatsapp',
+    status onboarding_status DEFAULT 'started',
+    current_step INTEGER DEFAULT 1,
+    total_steps INTEGER DEFAULT 5,
+
+    -- Business info collected
+    business_name VARCHAR(100),
+    business_giro VARCHAR(50),
+    owner_name VARCHAR(100),
+
+    -- Progress tracking
+    templates_imported INTEGER DEFAULT 0,
+    products_added INTEGER DEFAULT 0,
+    photos_processed INTEGER DEFAULT 0,
+    audios_processed INTEGER DEFAULT 0,
+
+    -- Metadata
+    metadata JSONB,
+    last_message_at TIMESTAMPTZ,
+    completed_at TIMESTAMPTZ,
+    started_at TIMESTAMPTZ DEFAULT NOW(),
+    updated_at TIMESTAMPTZ DEFAULT NOW()
+);
+
+-- INDICES para onboarding_sessions
+CREATE INDEX IF NOT EXISTS idx_onboarding_sessions_tenant_status
+    ON auth.onboarding_sessions(tenant_id, status);
+CREATE INDEX IF NOT EXISTS idx_onboarding_sessions_phone
+    ON auth.onboarding_sessions(phone_number);
+CREATE INDEX IF NOT EXISTS idx_onboarding_sessions_status
+    ON auth.onboarding_sessions(status) WHERE status != 'completed';
+
+-- TABLA: product_scans
+CREATE TABLE IF NOT EXISTS catalog.product_scans (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    session_id UUID NOT NULL REFERENCES auth.onboarding_sessions(id) ON DELETE CASCADE,
+    tenant_id UUID REFERENCES auth.tenants(id) ON DELETE SET NULL,
+    type scan_type NOT NULL,
+    status scan_status DEFAULT 'pending',
+
+    -- Input data
+    media_url TEXT,
+    media_mime_type VARCHAR(50),
+    raw_text TEXT,
+
+    -- OCR/Transcription results
+    detected_name VARCHAR(150),
+    detected_price DECIMAL(10,2),
+    detected_barcode VARCHAR(50),
+    confidence_score DECIMAL(3,2),
+
+    -- Matched template
+    template_id UUID REFERENCES catalog.product_templates(id) ON DELETE SET NULL,
+    template_match_score DECIMAL(3,2),
+
+    -- Final product created
+    product_id UUID REFERENCES catalog.products(id) ON DELETE SET NULL,
+
+    -- User corrections
+    user_confirmed_name VARCHAR(150),
+    user_confirmed_price DECIMAL(10,2),
+
+    -- Metadata
+    metadata JSONB,
+    error_message TEXT,
+    processing_time_ms INTEGER,
+    created_at TIMESTAMPTZ DEFAULT NOW()
+);
+
+-- INDICES para product_scans
+CREATE INDEX IF NOT EXISTS idx_product_scans_session_status
+    ON catalog.product_scans(session_id, status);
+CREATE INDEX IF NOT EXISTS idx_product_scans_template
+    ON catalog.product_scans(template_id) WHERE template_id IS NOT NULL;
+
+-- TRIGGER: Actualizar updated_at en onboarding_sessions
+CREATE OR REPLACE FUNCTION update_onboarding_sessions_updated_at()
+RETURNS TRIGGER AS $$
+BEGIN
+    NEW.updated_at = NOW();
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+DROP TRIGGER IF EXISTS trg_onboarding_sessions_updated_at ON auth.onboarding_sessions;
+CREATE TRIGGER trg_onboarding_sessions_updated_at
+    BEFORE UPDATE ON auth.onboarding_sessions
+    FOR EACH ROW
+    EXECUTE FUNCTION update_onboarding_sessions_updated_at();
+
+-- =====================================================
+-- FIN DEL SCHEMA
+-- =====================================================