Zero-quota limits fail fast; Vertex AI mapping fixed

What's Changed

• fix(core): implement atomic update in MCP tool discovery by @luisfelipe-alt in https://github.com/google-gemini/gemini-cli/pull/27619
• Vertex ai model mapping fix by @DavidAPierce in https://github.com/google-gemini/gemini-cli/pull/27749
• Add documentation and migration commands for Antigravity CLI by @DavidAPierce in https://github.com/google-gemini/gemini-cli/pull/27765
• Avoid persisting empty resume sessions by @SandyTao520 in https://github.com/google-gemini/gemini-cli/pull/27770
• chore(release): bump version to 0.48.0-nightly.20260609.g3a13b8eeb by @gemini-cli-robot in https://github.com/google-gemini/gemini-cli/pull/27779
• ci(dependabot): enable cooldown period for npm packages by @ruomengz in https://github.com/google-gemini/gemini-cli/pull/27743
• refactor(core): standardize tool output formatting by @galz10 in https://github.com/google-gemini/gemini-cli/pull/27772
• ci: update workflow logging and policy configurations by @galz10 in https://github.com/google-gemini/gemini-cli/pull/27853
• fix(core): Ensure zero-quota limits fail fast to prevent retry loop hang by @luisfelipe-alt in https://github.com/google-gemini/gemini-cli/pull/27698
• fix(core): handle multi-line escaped quotes in stripShellWrapper by @sanchezcoraspe in https://github.com/google-gemini/gemini-cli/pull/27467

New Contributors

• @luisfelipe-alt made their first contribution in https://github.com/google-gemini/gemini-cli/pull/27619
• @sanchezcoraspe made their first contribution in https://github.com/google-gemini/gemini-cli/pull/27467

Full Changelog: https://github.com/google-gemini/gemini-cli/compare/v0.47.0-nightly.20260609.g0567b25a2...v0.48.0-nightly.20260613.g9e5599c32