At-reference file path resolution fixed

What's Changed

• fix(core-tools): resolve defensive path resolution for at-reference files and fix macOS tests by @luisfelipe-alt in https://github.com/google-gemini/gemini-cli/pull/28053
• feat(caretaker): implement Cloud Run webhook ingestion service by @chadd28 in https://github.com/google-gemini/gemini-cli/pull/28015

New Contributors

• @chadd28 made their first contribution in https://github.com/google-gemini/gemini-cli/pull/28015

Full Changelog: https://github.com/google-gemini/gemini-cli/compare/v0.51.0-nightly.20260630.gae0a3aa7b...v0.51.0-nightly.20260701.g7f00c5fe5