Gemini CLI v0.51.0-nightly internal release

What's Changed

• feat(caretaker): egress cloud run service skeleton by @chadd28 in https://github.com/google-gemini/gemini-cli/pull/28167

Full Changelog: https://github.com/google-gemini/gemini-cli/compare/v0.51.0-nightly.20260702.gff00dacd9...v0.51.0-nightly.20260703.gf7af4e518