fix: restore complete admin feature dependencies

src/env.ts

@@ -56,6 +56,8 @@ const schema = z.object({
   OPENAI_API_KEY: z.string().optional(),
   // Optional alerting (jobs worker / alert service).
   DISCORD_WEBHOOK_URL: z.string().url().optional(),
+  TELEGRAM_BOT_TOKEN: z.string().optional(),
+  TELEGRAM_CHAT_ID: z.string().optional(),
   ALERT_EMAIL: z.string().optional(),
   // Optional PayPal top-up.
   PAYPAL_CLIENT_ID: z.string().optional(),