fix: use actual C types for threading lock isinstance checks

threading.Lock and threading.RLock are factory functions, not types —
they can't be used in isinstance(). Use _thread.LockType and
_thread.RLock which are the actual C extension types.

Author: KRRT7

codeflash/verification/comparator.py

@@ -637,8 +637,7 @@ def comparator(orig: Any, new: Any, superset_obj: bool = False) -> bool:
             orig,
             (
                 _thread.LockType,
-                threading.Lock,
-                threading.RLock,
+                _thread.RLock,
                 threading.Event,
                 threading.Condition,
                 sqlite3.Connection,