- Allow 'cache-control' and 'pragma' headers in CORS_ALLOW_HEADERS to prevent CORS preflight errors on transmitter and hadith requests
- Support both 'hadis' and 'hadis_id' query parameters in AdminHadisCorrectionViewSet
- Support both 'category' and 'category_id' query parameters in AdminHadisInterpretationViewSet
- Support both 'hadis'/'hadis_id' and 'reference'/'reference_id' in AdminHadisReferenceImageViewSet upload handler
- Refactor QuranSecondaryTranslation to store language_code, translation_text and translator per record
- Add migrations 0042 and 0043 to migrate existing secondary translations
- Update AdminCategoryQuranVerseSerializer and AdminHadisCategorySerializer with proper secondary translations handling
- Support category filtering by source_type, has_quran_verse and exclude_verse_id in admin category viewset
- Optimize HadisSyncSerializer: remove unused number, address_details, and book descriptions
- Separate sync serializers for corrections and interpretations (omitting redundant hadis_info and category_info)
- Add HadisDatabaseVersion model and migration for tracking offline SQLite DB
- Add export_hadis_sqlite management command with gzip compression and single-file overwrite
- Add GET /api/hadis/sync/database/ endpoint and enhance version serializers
- Automatically trigger background SQLite database export on version increment in admin
- Return raw, unlocalized translation list in HadisSyncSerializer for Flutter offline multi-language support
- Enable hadis signals in HadisConfig.ready() to load cache invalidation listeners
- Add ContentRelease to TARGET_MODELS and implement invalidate_hadis_cache helper
- Trigger explicit cache invalidation in AdminContentReleaseViewSet upon version increment and CRUD
- Update HadisSyncView swagger documentation example
