feat(childManage): enhance settings restriction management with new endpoints and DTO updates
- Add endpoints to retrieve forbidden words and user settings by user ID
- Update SettingsRestrictionDTO to include child ID and validation annotations
- Refactor ChildManageMapper to use static methods for DTO-entity conversions
- Improve exception handling in SettingsRestrictionService for user settings retrieval
- Update application.yml for local database connection
Closes IA-694