feat(dashboard): add moderation log page + message edit history

- Backend moderation module: GET /api/moderation/stats (per-status + failed rate)
  + GET /api/moderation/actions (filter by status/actionType, cursor paging),
  joins messages for target username + content
- Message GET /api/messages/detail/:id now returns edit_count + edit_history
  (old_content snapshots from message_edits, newest first)
- FE: new /moderation page — summary cards (total/executed/failed/pending +
  failed-rate), status+type filter chips, timeline rows with action icon,
  target user, reason, status badge, timestamps, error text
- FE: message detail shows 'Riwayat edit' panel with previous versions

services/backend/src/http/app.ts

@@ -13,6 +13,7 @@ import { createDashboardRouter } from "../modules/dashboard/index.js";
 import { createHealthRouter } from "../modules/health/index.js";
 import { createMediaRouter } from "../modules/media/index.js";
 import { createMessagesRouter } from "../modules/messages/index.js";
+import { createModerationRouter } from "../modules/moderation/index.js";
 import { createRecordingsRouter } from "../modules/recordings/index.js";
 import { createUiStateRouter } from "../modules/ui-state/index.js";
 import { createVoiceRouter } from "../modules/voice/index.js";
@@ -69,6 +70,7 @@ export function createHttpApp(): Express {
   app.use("/api", createUiStateRouter());
   app.use("/api", createMediaRouter());
   app.use("/api", createVoiceRouter());
+  app.use("/api", createModerationRouter());
 
   // 404 handler
   app.use((_req: Request, res: Response) => {