refactor(router): remove duplicate progress routes, add ProgressService to config

- Remove GET /progress/:id and POST /progress/:id from progress routes.
  These were superseded by the media-item progress routes. Only
  GET /progress/:id/history remains.

- Add ProgressService to router.Config so sync.go can inject it into
  KoboHandler via SetProgressService().

- Inject ProgressService into KoboHandler at route registration time
  rather than requiring a separate setup step.

- Update comment from 'Legacy progress routes' to 'Progress routes'.

internal/router/progress.go

@@ -7,12 +7,8 @@ import (
 func registerProgressRoutes(cfg *Config, scannerHandler *handlers.Handler) {
 	e := cfg.Echo
 
-	// JWT middleware for protected routes
 	jwtMiddleware := createJWTMiddleware(cfg)
 	protected := e.Group("/api", jwtMiddleware)
 
-	// Universal Progress routes
-	protected.GET("/progress/:id", scannerHandler.GetUniversalProgress)
-	protected.POST("/progress/:id", scannerHandler.UpdateUniversalProgress)
 	protected.GET("/progress/:id/history", scannerHandler.GetProgressHistory)
 }