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/loop/state.go

@@ -106,4 +106,4 @@ func (s State) Since(key string) (time.Duration, bool) {
 		return 0, true
 	}
 	return s.Now.Sub(f.Ts), true
-}
+}