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/tests/test_addresses.py

@@ -0,0 +1,41 @@
+import pytest
+from fastapi import HTTPException
+
+from api.v1.modules.crm.accounts import service as accounts_service
+from api.v1.modules.crm.accounts.dto import AccountCreate
+from api.v1.modules.crm.addresses import service
+from api.v1.modules.crm.addresses.dto import AddressCreate
+from api.v1.modules.crm.suppliers import service as suppliers_service
+from api.v1.modules.crm.suppliers.dto import SupplierCreate
+
+T, C = 1, 1
+
+
+def test_address_requires_exactly_one_owner(db):
+    # Ni cliente ni proveedor
+    with pytest.raises(HTTPException) as exc:
+        service.create_address(db, AddressCreate(address_type="fiscal"), T, C)
+    assert exc.value.status_code == 422
+
+
+def test_address_rejects_both_owners(db):
+    acc = accounts_service.create_account(db, AccountCreate(name="Cli"), T, C)
+    sup = suppliers_service.create_supplier(db, SupplierCreate(name="Prov"), T, C)
+    with pytest.raises(HTTPException) as exc:
+        service.create_address(db, AddressCreate(account_id=acc.id, supplier_id=sup.id), T, C)
+    assert exc.value.status_code == 422
+
+
+def test_create_and_list_addresses_for_account(db):
+    acc = accounts_service.create_account(db, AccountCreate(name="Cli"), T, C)
+    service.create_address(db, AddressCreate(account_id=acc.id, address_type="fiscal", street="Av. Reforma", postal_code="06600", is_primary=True), T, C)
+    service.create_address(db, AddressCreate(account_id=acc.id, address_type="bodega", city="Tijuana"), T, C)
+    addrs = service.get_addresses(db, T, C, account_id=acc.id)
+    assert len(addrs) == 2
+    assert addrs[0].is_primary is True  # el principal va primero
+
+
+def test_address_rejects_unknown_owner(db):
+    with pytest.raises(HTTPException) as exc:
+        service.create_address(db, AddressCreate(account_id=999, address_type="fiscal"), T, C)
+    assert exc.value.status_code == 422