Comprehensive test coverage for backend/app/api/v1/endpoints/mail_accounts.py:
- CRUD operations (create, list, get, update, delete)
- Subscription limit enforcement and superuser bypass
- Account toggle with ERROR→ACTIVE status reset
- Pull-now with disabled account guard
- Test connection (new and existing) with decrypt failure handling
- Auto-detect mail settings
- Paginated processing runs and logs
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>