Bug-Reports, Devlog-Threads und Watchdog

- /bug (alle Member): erstellt Gitea-Issue inkl. Screenshot-Upload als Asset;
  bug_reports-Tabelle für den Rückkanal — Issue geschlossen (issues-Webhook)
  → DM an den Reporter
- Auto-Thread '💬 Devlog <Datum>' unter jedem Devlog-Post (Setting, Default an)
- Watchdog: prüft Setting watchdog_urls alle 2 min, DM an Admin nach 2 Fails
  in Folge + Entwarnung mit Downtime-Dauer
- Setup-Seite: Bug-Repo, Threads-Toggle, Watchdog-URLs; Env GITEA_API_TOKEN/GITEA_URL

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/bot/client.js

@@ -5,9 +5,10 @@ import { devlogChannelId, devlogPingRoleId } from '../runtime-settings.js';
 import { archiveDevlogMessage, removeDevlog } from './devlog-archive.js';
 import * as ping from './commands/ping.js';
 import * as devlogBackfill from './commands/devlog-backfill.js';
+import * as bug from './commands/bug.js';
 
 // Alle Commands hier eintragen — jedes Modul exportiert { data, execute }
-const commandModules = [ping, devlogBackfill];
+const commandModules = [ping, devlogBackfill, bug];
 
 export async function startBot() {
     const client = new Client({