[INTEGRATION] feat: Integrate template-saas scopes and database objects
## Documentation
- Align MCH-029 to MCH-032 with template-saas modules (SAAS-008 to SAAS-015)
- Create MCH-034 (Analytics) and MCH-035 (Reports) from SAAS-016/017
- Update PLAN-DESARROLLO.md with Phase 7 and 8
- Update _MAP.md indexes (35 total epics)
## Database (5 new schemas, 14 tables)
- Add storage schema: buckets, files, signed_urls
- Add webhooks schema: endpoints, deliveries
- Add audit schema: logs, retention_policies
- Add features schema: flags, tenant_flags (14 seeds)
- Add analytics schema: metrics, events, reports, report_schedules
- Add auth.oauth_connections for MCH-030
- Add timestamptz_to_date() IMMUTABLE function
- Update EXPECTED_SCHEMAS in recreate-database.sh
## Analysis Reports
- ANALISIS-INTEGRACION-TEMPLATE-SAAS-2026-01-13.md
- VALIDACION-COHERENCIA-2026-01-13.md
- GAP-ANALYSIS-BD-2026-01-13.md
- REPORTE-EJECUCION-2026-01-13.md
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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