fix: do not log stacktrace on db reconnect

This is confusing and spams the log despite no actual error happening.

manabi/lock.py

@@ -300,9 +300,7 @@ def execute(self, *args, **kwargs):
         try:
             self._cursor.execute(*args, **kwargs)
         except (InterfaceError, OperationalError):
-            _logger.error(
-                f"Postgres connection lost, reconnecting. {''.join(traceback.format_stack())}"
-            )
+            _logger.warn("Postgres connection lost, reconnecting")
 
             self.connect()
             self._cursor.execute(*args, **kwargs)