- Fixed circular imports in schema files by moving imports to module level
- Changed orm_mode=True to model_config with from_attributes=True
- Updated validator decorators to field_validator in all schema files
- Properly annotated fields in all schema files for Pydantic v2 compatibility
- Replaced BaseSettings import from pydantic to pydantic-settings
- Updated validator to field_validator with mode='before'
- Changed Config inner class to model_config dict
- Added pydantic-settings to requirements.txt