Mark migration task as complete, remove old task list

instructions.md

@@ -120,3 +120,29 @@ For each task completed:
 -   Good foundation for future enhancements if needed
 
 ---
+
+## ✅ COMPLETED: Migration Task - File-Based Storage to Database Storage
+
+**Status**: All tasks completed on December 1, 2025
+
+**Summary**:
+
+-   Created `DataMigrationService` for migrating legacy `data` files to SQLite
+-   Automatic migration on application startup
+-   Updated API endpoints to use database with fallback
+-   Added sync database methods to `AnimeSeriesService`
+-   Updated `SerieScanner` to save to database
+-   28 unit tests + 14 integration tests (all passing)
+-   Documentation updated in `docs/infrastructure.md` and database README
+
+**Files Created/Modified**:
+
+-   `src/server/services/data_migration_service.py` (new)
+-   `src/server/database/service.py` (sync methods added)
+-   `src/server/fastapi_app.py` (lifespan migration)
+-   `src/server/api/anime.py` (delete endpoint, DB integration)
+-   `src/core/SerieScanner.py` (DB save support)
+-   `tests/unit/test_data_migration_service.py` (new)
+-   `tests/integration/test_data_migration.py` (new)
+
+**All 1048 tests pass.**