feat(logging): implement centralized logging system and replace console errors with structured logs

feat(federation): add room sync and deletion notification endpoints for federated instances

fix(federation): handle room deletion and update settings during sync process

feat(federation): enhance FederatedRoomCard and FederatedRoomDetail components to display deleted rooms

i18n: add translations for room deletion messages in English and German

server/middleware/auth.js

@@ -2,9 +2,10 @@ import jwt from 'jsonwebtoken';
 import { v4 as uuidv4 } from 'uuid';
 import { getDb } from '../config/database.js';
 import redis from '../config/redis.js';
+import { log } from '../config/logger.js';
 
 if (!process.env.JWT_SECRET) {
-  console.error('FATAL: JWT_SECRET environment variable is not set. ');
+  log.auth.error('FATAL: JWT_SECRET environment variable is not set.');
   process.exit(1);
 }
 const JWT_SECRET = process.env.JWT_SECRET;
@@ -29,7 +30,7 @@ export async function authenticateToken(req, res, next) {
         }
       } catch (redisErr) {
         // Graceful degradation: if Redis is unavailable, allow the request
-        console.warn('Redis blacklist check skipped:', redisErr.message);
+        log.auth.warn(`Redis blacklist check skipped: ${redisErr.message}`);
       }
     }