feat: implement SQL database connector with lazy engine and fallback support for project metadata loading

Data/database/sql_connector.py

@@ -28,7 +28,7 @@ def get_engine():
         connection_string = (
             f"mssql+pyodbc:///?odbc_connect={params}"
         )
-        _engine = create_engine(connection_string)
+        _engine = create_engine(connection_string, pool_pre_ping=True)
         
         # Test connection once lazily
         try: