fix(alerts): stop mentioning OnCall on warnings

Author: AnastaZIuk

terraform/k8s/monitoring-oncall.tpl.yaml

@@ -751,6 +751,7 @@ data:
         mention = f"<@&{ONCALL_ROLE_ID}>" if ONCALL_ROLE_ID else "@OnCall"
         mentions = {"parse": [], "roles": [ONCALL_ROLE_ID]} if ONCALL_ROLE_ID else {"parse": []}
         payload = {
+            "content": "",
             "embeds": [embed],
             "allowed_mentions": {"parse": []},
         }
@@ -834,6 +835,8 @@ spec:
     metadata:
       labels:
         app: oncall-discord-proxy
+      annotations:
+        proxy.devsh.eu/restartedAt: "2025-12-14T00:00:00Z"
     spec:
       serviceAccountName: oncall-bootstrap
       containers: