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_suppliers.py

@@ -0,0 +1,51 @@
+import pytest
+from fastapi import HTTPException
+
+from api.v1.modules.crm.suppliers import service
+from api.v1.modules.crm.suppliers.dto import SupplierCreate, SupplierUpdate
+
+T, C = 1, 1
+
+
+def test_create_supplier_with_multivalue_fields(db):
+    supplier = service.create_supplier(
+        db,
+        SupplierCreate(
+            name="Naviera del Golfo SA",
+            classifications=["naviera", "agente_carga"],
+            coverage="internacional",
+            countries=["MX", "US", "PA"],
+            ports=["Veracruz", "Manzanillo"],
+            customs=["Veracruz"],
+            quote_currency="USD",
+        ),
+        T, C, user_id="dev",
+    )
+    assert supplier.id is not None
+    assert supplier.status == "active"
+    assert supplier.classifications == ["naviera", "agente_carga"]
+    assert supplier.countries == ["MX", "US", "PA"]
+    assert supplier.created_by == "dev"
+
+
+def test_list_and_search_supplier(db):
+    service.create_supplier(db, SupplierCreate(name="Aerolínea Carga MX", classifications=["aerolinea"]), T, C)
+    service.create_supplier(db, SupplierCreate(name="Transportes Terrestres"), T, C)
+    assert len(service.get_suppliers(db, T, C)) == 2
+    found = service.get_suppliers(db, T, C, search="aero")
+    assert len(found) == 1 and found[0].name == "Aerolínea Carga MX"
+
+
+def test_update_supplier_replaces_lists(db):
+    s = service.create_supplier(db, SupplierCreate(name="X", classifications=["naviera"]), T, C)
+    upd = service.update_supplier(db, s.id, SupplierUpdate(classifications=["ferrocarril", "almacen"]), T, C)
+    assert upd.classifications == ["ferrocarril", "almacen"]
+
+
+def test_soft_delete_supplier(db):
+    s = service.create_supplier(db, SupplierCreate(name="Y"), T, C)
+    service.delete_supplier(db, s.id, T, C)
+    with pytest.raises(HTTPException) as exc:
+        service.get_supplier(db, s.id, T, C)
+    assert exc.value.status_code == 404
+    assert service.get_suppliers(db, T, C) == []