feat: Sites feature backend

api/handlers/media/purgeHandler.go

@@ -53,6 +53,7 @@ type purgeRunResponse struct {
 	GroupsPurged    int `json:"groups_purged"`
 	Merged          int `json:"merged"`
 	ArticlesUpdated int `json:"articles_updated"`
+	SitesUpdated    int `json:"sites_updated"`
 	FailedGroups    int `json:"failed_groups"`
 }
 
@@ -164,6 +165,7 @@ func (h *Handler) RunPurge(w http.ResponseWriter, r *http.Request) {
 		GroupsPurged:    result.GroupsPurged,
 		Merged:          result.Merged,
 		ArticlesUpdated: result.ArticlesUpdated,
+		SitesUpdated:    result.SitesUpdated,
 		FailedGroups:    result.FailedGroups,
 	})
 }