feat: notify RD Gateway events in Telegram outside min_severity

Route rdg.connection.* through notify_rdg_connection and add disconnected type.

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

backend/app/api/v1/events.py

@@ -21,11 +21,13 @@ from app.services.notify_dispatch import (
     AUTH_LOGIN_SUCCESS_TYPES,
     DAILY_REPORT_EVENT_TYPES,
     LIFECYCLE_EVENT_TYPE,
+    RDG_CONNECTION_TYPES,
     notify_auth_login,
     notify_daily_report,
     notify_event,
     notify_lifecycle,
     notify_problem,
+    notify_rdg_connection,
 )
 
 router = APIRouter(prefix="/events", tags=["events"])
@@ -79,6 +81,8 @@ def post_event(
             notify_lifecycle(event, db=db)
         elif event.type in AUTH_LOGIN_SUCCESS_TYPES:
             notify_auth_login(event, db=db)
+        elif event.type in RDG_CONNECTION_TYPES:
+            notify_rdg_connection(event, db=db)
         else:
             notify_event(event, db=db)
         if problem is not None and problem_created: