🐛(backend) catch all request exceptions in summary service integration

Replace narrow HTTPError handling with broad RequestException
catch to prevent crashes from network failures (ConnectionError),
timeouts (30s exceeded), SSL/TLS errors, and other request failures
that previously caused unhandled exceptions.

Ensures consistent False return and proper logging for all network-related
failures instead of crashing application when summary service
communication encounters infrastructure issues beyond HTTP errors.

src/backend/core/recording/event/notification.py

@@ -158,9 +158,9 @@ class NotificationService:
                 timeout=30,
             )
             response.raise_for_status()
-        except requests.HTTPError as exc:
+        except requests.RequestException as exc:
             logger.exception(
-                "Summary service HTTP error for recording %s. URL: %s. Exception: %s",
+                "Summary service error for recording %s. URL: %s. Exception: %s",
                 recording.id,
                 settings.SUMMARY_SERVICE_ENDPOINT,
                 exc,