[torch817]

This PR fixes two issue areas when interacting with Google Antigravity endpoints:

1. Fix [WIP] Add FastAPI OpenAI-compatible LLM gateway with routing #1 (HTTP 400): Strip toolConfig from translated tools in antigravityToOpenAIRequest to prevent schema rejection errors when tools are defined.
2. Fix build(deps): bump actions/github-script from 7 to 8 #2 (HTTP 403): Scrub x-goog-user-project header in scrubProxyAndFingerprintHeaders to prevent permission/project rejection errors from Google backend.

[diegosouzapw]

Thanks for this, @torch817.

I checked both changes against release/v3.8.51, and neither one affects the path that actually runs:

• toolConfig is never copied into the upstream request in the current code, so the new test passes even without this PR.
• x-goog-user-project gets set again by applyAntigravityClientProfileHeaders() after the scrub. There is also already a one-time retry without that header on a 403 (open-sse/executors/antigravity/executeAttempt.ts).

Because of that, I'm closing this PR. If you still see the error on the current release/v3.8.51, please open an issue with a reproduction (model, request shape, and the upstream error) so we can fix it at the right place.