fix: alinear dbInstance de AllowedGroups con la del servidor antes del seed

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

src/server.ts

@@ -489,6 +489,7 @@ export class WebhookServer {
 		await Migrator.migrateToLatest(this.dbInstance);
 
 		// Etapa 7: seed inicial de grupos permitidos desde ALLOWED_GROUPS (best-effort)
+		try { (AllowedGroups as any).dbInstance = this.dbInstance; } catch {}
 		try { AllowedGroups.seedFromEnv(); } catch {}
 
 		const PORT = process.env.PORT || '3007';