fix: add ConfigDict for Pydantic model_config and ClassVar annotations

packages/crewai/tests/security/test_fingerprint.py

@@ -5,7 +5,6 @@ import uuid
 from datetime import datetime, timedelta
 
 import pytest
-from pydantic import ValidationError
 
 from crewai.security import Fingerprint
 
@@ -260,4 +259,4 @@ def test_fingerprint_metadata_mutation():
 
     # Ensure immutable fields remain unchanged
     assert fingerprint.uuid_str == uuid_str
-    assert fingerprint.created_at == created_at
+    assert fingerprint.created_at == created_at