add ip change notification and refine sender display

app/api/routes/public_ip.py

@@ -3,8 +3,9 @@ from sqlalchemy.orm import Session
 
 from app.dependencies import get_auth_db, get_current_auth_session
 from app.schemas.public_ip import PublicIPCheckResponse
+from app.config import get_settings
 from app.services.auth import AuthenticatedSession
-from app.services.public_ip import check_public_ipv4
+from app.services.public_ip import check_public_ipv4_and_notify
 
 router = APIRouter(tags=["public-ip"])
 
@@ -17,7 +18,7 @@ def run_public_ip_check(
     if current_auth is None:
         raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="authentication required")
 
-    result = check_public_ipv4(session)
+    result = check_public_ipv4_and_notify(session, bootstrap_settings=get_settings())
     return PublicIPCheckResponse(
         status=result.status,
         checked_at=result.checked_at,