feat(v0.2.0): complete data pipeline with loaders, database, and validation

tests/unit/test_data/test_database.py

@@ -41,23 +41,27 @@ def test_init_database(temp_db):
 
 def test_get_db_session(temp_db):
     """Test database session context manager."""
+    from sqlalchemy import text
+
     init_database(create_tables=True)
 
     with get_db_session() as session:
         assert session is not None
         # Session should be usable
-        result = session.execute("SELECT 1").scalar()
+        result = session.execute(text("SELECT 1")).scalar()
         assert result == 1
 
 
 def test_session_rollback_on_error(temp_db):
     """Test that session rolls back on error."""
+    from sqlalchemy import text
+
     init_database(create_tables=True)
 
     try:
         with get_db_session() as session:
             # Cause an error
-            session.execute("SELECT * FROM nonexistent_table")
+            session.execute(text("SELECT * FROM nonexistent_table"))
     except Exception:
         pass  # Expected