fix: host_silence proactive notify when event is None

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/app/services/host_silence_scan.py

@@ -114,6 +114,13 @@ def dispatch_host_silence_notifications(db: Session, results: list[HostSilenceSc
     for item in results:
         if not item.created:
             continue
-        notify_problem(item.problem, event=None, db=db)
-        sent += 1
+        try:
+            notify_problem(item.problem, event=None, db=db)
+            sent += 1
+        except Exception:
+            logger.exception(
+                "host_silence notify failed host=%s problem_id=%s",
+                item.hostname,
+                item.problem.id,
+            )
     return sent

backend/app/services/telegram_templates.py

@@ -543,8 +543,6 @@ def format_problem_telegram_html(problem: Problem, event: Event | None = None) -
     msg += f"\n<b>{html_escape(problem.title)}</b>\n{html_escape(problem.summary)}"
     if event is not None:
         msg += f"\n\n<i>Триггер:</i> {html_escape(event.type)} ({html_escape(event.severity)})"
-    elif problem.rule_id == "rule:host_silence":
-        msg += "\n\n<i>Триггер:</i> периодическая проверка SAC (host_silence scan)"
         if event.type in (
             "rdp.login.success",
             "rdp.login.failed",
@@ -557,4 +555,6 @@ def format_problem_telegram_html(problem: Problem, event: Event | None = None) -
             "smb.admin_share.access",
         ):
             msg += "\n" + _format_event_body_html(event)
+    elif problem.rule_id == "rule:host_silence":
+        msg += "\n\n<i>Триггер:</i> периодическая проверка SAC (host_silence scan)"
     return append_notification_source_html(msg, generated_by="sac")