Fix unscheduling deleted Google Calendar events

Author: KrisBraun

.changeset/optional-link-title.md

@@ -0,0 +1,5 @@
+---
+"@plotday/twister": patch
+---
+
+Changed: `NewLinkWithNotes.title` is now optional — omit to preserve existing title on upsert

connectors/google-calendar/src/google-api.ts

@@ -372,7 +372,7 @@ export function transformGoogleEvent(
   const isCancelled = event.status === "cancelled";
 
   const result: TransformedEvent = {
-    title: event.summary || (isCancelled ? "Cancelled event" : ""),
+    title: event.summary || "",
     meta: {
       id: event.id,
       calendarId: calendarId,