Error Handling and Edge Case Tests

[slint]

We need tests for error handling and edge cases to ensure the Metadata Check system is robust and resilient to unexpected inputs.

Test Cases to Implement

1. Expression Evaluation Errors

   • Test behavior when record is None
   • Test behavior with malformed records
   • Test behavior with unexpected data types

2. Rule Evaluation Edge Cases

   • Test rules with empty checks
   • Test rules with contradictory conditions
   • Test behavior with extremely nested expressions
   • Test with missing fields in deeply nested paths

3. Performance Edge Cases

   • Test behavior with large records
   • Test behavior with many rules
   • Test behavior with deeply nested expressions