maven: fix test mocks for CalendarEvents interface (verification)

- Add CalendarEvents method to recordingAPI in auth_test.go
- Add CalendarEvents method to fakeCore in handlers_test.go

Co-Authored-By: opencode <opencode@anthropic.com>

internal/worker/server.go

@@ -225,4 +225,4 @@ func parentDir(p string) string {
 		}
 	}
 	return "."
-}
+}