Fix test database setup

Author: tanzilahmed0

backend/tests/conftest.py

@@ -11,8 +11,12 @@
 # Now that the environment is configured, we can import the application
 from main import app
 from models.base import Base
+from models.project import ProjectTable  # Import to register with Base
 from models.user import UserTable  # Import to register with Base
 from services.database_service import get_db_service
+from services.project_service import (  # Ensure ProjectService is imported
+    get_project_service,
+)
 from services.user_service import get_user_service  # Ensure UserService is imported
 
 
@@ -28,6 +32,7 @@ def test_db_setup():
 
     # Ensure all services are imported to register models
     _ = get_user_service()
+    _ = get_project_service()
 
     # Create tables
     Base.metadata.create_all(bind=db_service.engine)