fix(alerts): drop stand-down prefix on one-shot failures

src/healthbot/alerts.py

@@ -17,6 +17,17 @@ INFORMATIONAL = frozenset(
     }
 )
 
+FAILURE = frozenset(
+    {
+        "ProcedureFailed",
+        "ActionFailed",
+        "BuildFailed",
+        "RepoBuildFailed",
+    }
+)
+
+ONE_SHOT = INFORMATIONAL | FAILURE
+
 
 def _gb(value: Any) -> str:  # noqa: ANN401
     try:
@@ -104,7 +115,7 @@ def format_alert(payload: dict) -> str:
     inner = data.get("data") or {}
 
     informational = kind in INFORMATIONAL
-    resolved = bool(payload.get("resolved")) and not informational
+    resolved = bool(payload.get("resolved")) and kind not in ONE_SHOT
 
     if informational:
         icon = "ℹ️"