test: fix test_models to use test engine and import models

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

backend/tests/test_models.py

@@ -0,0 +1,29 @@
+import pytest
+from sqlalchemy import inspect
+
+from app.database import Base
+from app.models import (
+    Conversation,
+    DigitalEmployee,
+    Document,
+    KnowledgeBase,
+    Tenant,
+    TenantConfig,
+)
+from tests.conftest import test_engine
+
+
+@pytest.mark.asyncio
+async def test_all_tables_created():
+    expected_tables = {
+        "tenants",
+        "tenant_configs",
+        "digital_employees",
+        "conversations",
+        "messages",
+        "knowledge_bases",
+        "documents",
+    }
+    async with test_engine.begin() as conn:
+        tables = await conn.run_sync(lambda sync_conn: inspect(sync_conn).get_table_names())
+    assert set(tables) == expected_tables