Changelog for v0.54.0

[gemini-cli-robot]

This PR contains the auto-generated changelog for the v0.54.0 release.

Please review and merge.

Related to #18505

[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request formalizes the v0.54.0 release by updating the project's documentation. It includes the official release notes, a summary of key feature additions and security enhancements, and a comprehensive list of all changes merged into this version.

Highlights

• PR Generation & Antigravity Agent: Integrated the Antigravity agent runner with dual-locking Firestore concurrency controls to improve PR generation reliability.
• Caretaker Triaging & Security: Enhanced caretaker triage processes by adding descriptive comments before auto-closing issues and sanitizing issue titles in untrusted contexts.
• Authentication & Session Robustness: Strengthened security by enforcing HTTPS for credential providers, rotating session IDs on model fallbacks, and improving history filtering.

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[github-actions]

📊 PR Size: size/M

• Lines changed: 108
• Additions: +77
• Deletions: -31
• Files changed: 2

[gemini-code-assist]

Code Review

This pull request updates the changelog documentation to announce the release of version v0.54.0. It adds the release announcements to docs/changelogs/index.md and updates the latest stable release details, highlights, and list of changes in docs/changelogs/latest.md. There are no review comments, and I have no feedback to provide.

_{Note: Security Review has been skipped due to the limited scope of the PR.}

[github-actions]

Size Change: -4 B (0%)

Total Size: 35.2 MB

Filename	Size	Change
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./bundle/oauth2-provider-QT2GGOCN.js	9.12 kB	+9.12 kB (new file)	🆕

ℹ️ View Unchanged

Filename	Size	Change
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./bundle/cleanup-FVJSLCTB.js	902 B	+902 B (new file)	🆕
./bundle/start-CR5PQL6F.js	622 B	+622 B (new file)	🆕

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