Library generation failed (d706482)

See [failed job](https://github.com/googleapis/google-cloudevents-java/actions/runs/19158950298)

Open the linked failed job and inspect the error for the library generation step. Trace the generation entry point identified by the job logs; the work is done when the generation job completes successfully for d706482.

索引モデルが issue の本文から書いたものです。