<fastapi.exceptions.RequestValidationError object at 0x7f8b8c0a3d90>

After:
2 validation errors for request:
  {'type': 'int_parsing', 'loc': ['query', 'id'], 'msg': 'Input should be a valid integer'}
  {'type': 'missing', 'loc': ['query', 'name'], 'msg': 'Field required'}

Benefits

- Better debugging experience - Error messages are immediately readable in logs and console output
- Consistency - All validation error classes now have the same string representation behavior
- Non-breaking - Existing code continues to work; this only enhances the developer experience when errors are
converted to strings

Testing

All existing tests pass, and new tests verify:
- Single error formatting
- Multiple error formatting
- Proper pluralization ("1 validation error" vs "2 validation errors")
- Consistency across all validation error types

Checklist

- Tests added for the new functionality
- All tests pass
- Code follows existing style and patterns
- Non-breaking change