feat(handlers): integrate ProgressService into media, koreader, kobo, and queue

All four progress write paths now delegate to ProgressService.SaveProgress:

- MediaHandler: UpdateMediaReadingProgress uses ProgressService for web
  saves with richer request body (reading_mode, zoom_level, scroll). GET
  now uses GetUniversalProgress query that JOINs media_items for
  format_group, total_characters, chapter_count.

- KOReaderHandler: updateProgressForBook delegates to ProgressService.
  Fixed device ID bug (was using userID, now uses deviceID). Removed
  duplicate UpdateDeviceLastSync with zero UUID. Added pgtype helper
  functions (textPtrToPgText, intPtrToPgInt4, int64PtrToPgInt8).

- KoboHandler: all four progress write points (Markup ReadingSync, Markup
  last-read-place, AnalyticsGettests, SyncFromServer) delegate to
  ProgressService. Fixed empty epubcfi string now correctly set to
  Valid: false. SyncFromServer preserves last_sync_source=bookhoard
  and Broadcast: false.

- QueueProcessor: syncProgress delegates to ProgressService.

- main.go: creates ProgressService after ConnectionManager, injects via
  SetProgressService() on all handlers and queue processor.

Handler tests cover pgtype conversion helpers (textPtrToPgText, etc.)
and device icon mapping.

cmd/server/main.go

@@ -62,8 +62,10 @@ func main() {
 	// Create WebSocket connection manager
 	connManager := sync.NewConnectionManager()
 
-	// Create sync queue processor
+	progressService := sync.NewProgressService(queries, connManager)
+
 	queueProcessor := sync.NewSyncQueueProcessor(queries)
+	queueProcessor.SetProgressService(progressService)
 
 	// Create library service
 	libraryService := services.NewLibraryService(queries)
@@ -73,21 +75,21 @@ func main() {
 	services.WorkerInstance = worker
 
 	koreaderHandler := handlers.NewKOReaderHandler(queries, connManager, queueProcessor)
+	koreaderHandler.SetProgressService(progressService)
 	wsHandler := handlers.NewWSHandler(queries, connManager, cfg.JWTSecret, deviceAuthMiddleware)
 	conflictHandler := handlers.NewConflictHandler(queries, connManager)
 	analyticsHandler := handlers.NewAnalyticsHandler(queries)
 	queueHandler := handlers.NewQueueHandler(queries, queueProcessor)
 
-	// Create conversion service for EPUB→KEPUB conversion
 	conversionService := services.NewConversionService(queries, "/var/bookhoard/cache/kepub")
 	opdsHandler := handlers.NewOPDSHandler(queries, libraryService, conversionService)
 
-	// NEW: Create refactored handlers
 	collectionHandler := handlers.NewCollectionHandler(queries, libraryService, connManager)
 	dashboardService := services.NewDashboardService(queries)
 	dashboardHandler := handlers.NewDashboardHandler(queries)
 	filtersHandler := handlers.NewFiltersHandler(queries)
 	mediaHandler := handlers.NewMediaHandler(queries, libraryService, worker)
+	mediaHandler.SetProgressService(progressService)
 	matchingHandler := handlers.NewMatchingHandler(queries, connManager)
 	jobsHandler := handlers.NewJobsHandler(queries, worker)
 
@@ -153,6 +155,7 @@ func main() {
 		SidecarHandler:          sidecarHandler,
 		ConnManager:             connManager,
 		QueueProcessor:          queueProcessor,
+		ProgressService:         progressService,
 		DeviceAuthMiddleware:    deviceAuthMiddleware,
 		JobsHandler:             jobsHandler,
 		LoginTracker:            loginAttemptTracker,