fix: deliverd-telegram port in prometheus.yml (8821, not 8803)

deploy/prometheus/prometheus.yml

@@ -21,7 +21,7 @@ scrape_configs:
       - targets: ['deliverd-fcm:8802']
   - job_name: deliverd-telegram
     static_configs:
-      - targets: ['deliverd-telegram:8803']
+      - targets: ['deliverd-telegram:8821']
 
   # ── M8 DLQ + operator API ────────────────────────────────
   - job_name: admind