feat(crm): catálogos Clientes/Prospectos (enriquecido) y Proveedores + direcciones/documentos

Alinea el dominio al spec de catálogos:
- accounts (Clientes/Prospectos): tipo registro/persona, CURP, clasificación
  comercial, bloque fiscal (régimen, CFDI, pago, crédito), auditoría, notas internas
- suppliers (Proveedores): clasificación múltiple, cobertura, países/puertos/
  aeropuertos/aduanas (JSON), fiscal
- addresses y documents: tablas compartidas con FK a cliente o proveedor
- contacts enriquecidos (extensión, whatsapp, área, flags "recibe…", supplier_id)
- migración a7b8c9d0e1f2 (ALTER + CREATE) con downgrade completo
- permisos supplier/address/document; seed de datos actualizado
- 39 tests pytest en verde

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

backend/api/v1/modules/crm/router.py

@@ -10,16 +10,22 @@ from fastapi import APIRouter
 from . import permissions  # noqa: F401  (side-effect: registra permisos del CRM)
 from .accounts.routes import router as accounts_router
 from .activities.routes import router as activities_router
+from .addresses.routes import router as addresses_router
 from .contacts.routes import router as contacts_router
+from .documents.routes import router as documents_router
 from .leads.routes import router as leads_router
 from .metrics.routes import router as metrics_router
 from .opportunities.routes import router as opportunities_router
 from .pipelines.routes import router as pipelines_router
+from .suppliers.routes import router as suppliers_router
 
 router = APIRouter()
 
 router.include_router(accounts_router)
+router.include_router(suppliers_router)
 router.include_router(contacts_router)
+router.include_router(addresses_router)
+router.include_router(documents_router)
 router.include_router(leads_router)
 router.include_router(pipelines_router)
 router.include_router(opportunities_router)