fix: remove unsupported sync job type from job handler

Remove "sync" from the list of valid job types to align with
the removal of JobTypeSync from the Worker service.

internal/handlers/jobs.go

@@ -38,7 +38,7 @@ func (h *JobsHandler) CreateJob(c echo.Context) error {
 	// Validate job type
 	var jobType services.JobType
 	switch req.Type {
-	case "import", "convert", "thumbnails", "backup", "analytics", "sync":
+	case "import", "convert", "thumbnails", "backup", "analytics":
 		jobType = services.JobType(req.Type)
 	default:
 		return c.JSON(http.StatusBadRequest, map[string]string{