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/wire.go

@@ -62,7 +62,7 @@ type Request struct {
 // Response — one frame back from the worker. Exactly one of Result/Error is set.
 type Response struct {
 	Result json.RawMessage `json:"r,omitempty"`
-	Error  *RpcError        `json:"e,omitempty"`
+	Error  *RpcError       `json:"e,omitempty"`
 }
 
 // RpcError — a typed wire error. Mirrors internal/ipc's shape for tooling
@@ -120,4 +120,4 @@ func rpcErr(err error) *RpcError {
 		return &RpcError{Code: c, Message: err.Error()}
 	}
 	return &RpcError{Code: c}
-}
+}