fix: quitar bypass de rate limit en pruebas de GroupSync

Co-authored-by: aider (openrouter/openai/gpt-5) <aider@aider.chat>

src/services/group-sync.ts

@@ -118,9 +118,6 @@ export class GroupSyncService {
 	}
 
 	private static shouldSync(): boolean {
-		// En entorno de test, no aplicar rate limit de sincronización
-		if (process.env.NODE_ENV === 'test') return true;
-
 		const timeSinceLastSync = Date.now() - this.lastSyncAttempt;
 		const shouldSync = timeSinceLastSync > this.SYNC_INTERVAL_MS;