Remove deprecated personal_data endpoints

[helylle]

Remove deprecated personal_data endpoints

This PR removes four deprecated/unused personal_data endpoints that have zero frontend or backend callers. All functionality is already provided by newer, more focused endpoints.

Changes

Removed Endpoints

1. POST /user (deprecated)

   • Replaced by POST /user/name and POST /user/language
   • Already marked with @deprecated decorator
   • Removed route, schema (PersonalDataRequestSchema, PersonalDataSchema, PersonalDataResponseSchema), and 13 tests

2. GET /user

   • Superseded by GET /all-user-data which returns a superset of data
   • Removed route and 2 tests

3. GET /identities

   • Data already included in /all-user-data response
   • Removed route, schema (IdentitiesResponseSchema), and 1 test

4. GET /preferences

   • Data already included in /all-user-data response
   • Removed route and 1 test
   • Inlined get_user_preferences() function body into set_user_preferences() (was only called once, simple one-liner)

Test Helpers Removed

• _get_user() (2 call sites)
• _post_user() (13 call sites)
• _get_preferences() (1 call site)
• _get_user_identities() (1 call site)

All test functionality is preserved through equivalent tests on the replacement endpoints.

Verification

• ✅ All 23 remaining tests pass
• ✅ Code reformatted with ruff (clean)
• ✅ mypy type checking passes (795 files)
• ✅ ty type checking passes
• ✅ No lint errors

Impact

Breaking Change: Yes - removes 4 API endpoints

However, these endpoints have zero callers in the frontend or backend codebase:

• No production code references found
• No frontend API calls found
• Only references were in backend tests that exercised the endpoints themselves

The replacement endpoints (POST /user/name, POST /user/language, GET /all-user-data) have been available and provide all the same functionality with better separation of concerns.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud