fix(release): extract release-specific contributors for VitePress changelogs

[kentemman-gmd]

Summary

1. Fixes Contributor List Mismatch: Ensures the <Contributors> component in VitePress documentation and releases.json list only the authors who contributed to that specific release (instead of falling back to global repository git log -30 history).
2. Preserves PR & Issue Numbers: Extracts and attaches PR/issue links and numbers (e.g. ([#91](https://github.com/GMD-Repository/gemma-plugin/pull/91)) or (#433)) alongside author @mentions at the end of changelog items.

Key Changes

• PR & Issue Link Preservation: Updated _clean_line() in scripts/release/collect_changes.py to extract and format PR/issue links (e.g. (@author) (#433) or ([@author](...)) ([#91](...))).
• AI System Prompt Updated: Updated scripts/ai/prompts/release_notes.md rules and examples to instruct AI to preserve PR/issue links alongside author attributions.
• Release-Specific Contributor Extraction: Added extract_contributors_from_changes() in scripts/utils/changelog.py to parse author @mentions directly from release changelog items.
• Pipeline Update: Updated scripts/release/update_docs.py to prioritize release-specific contributors over global repository history logs (git log -30).
• Git Author Mapping: Mapped git commit author names to GitHub handles and filtered bot accounts in scripts/utils/github.py.
• Docs & Metadata Fix: Corrected contributor lists for releases 1.0.15 and 1.0.14 in docs/user-guide/changelog.md and docs/user-guide/public/releases.json.

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Project	Deployment	Actions	Updated (UTC)
gemma-plugin	Ready	Preview, Comment	Jul 29, 2026 4:30am