fix(rust): fix CI/CD release pipeline silently skipping all Rust releases

[konard]

Summary

Fixes #247 — The Rust CI/CD pipeline was silently skipping all releases despite successful builds and tests.

Root Cause Analysis

Primary root cause: The auto-release and manual-release jobs in rust.yml lacked always() in their if conditions. In GitHub Actions, when a job in the transitive dependency chain is skipped (like changelog-check which only runs on PRs), all downstream jobs without always() are also skipped by default — even if the immediate needs jobs all succeed.

The dependency chain on push events:

changelog-check (SKIPPED) → lint (always(), PASSES) → build (always(), PASSES)
                           → test (always(), PASSES) ↗
lint, test, build → auto-release (NO always() → SKIPPED!)

Secondary issues:

• The changelog version regex in create-github-release.mjs didn't support Rust's ## [version] - date format (only JS's ## version)
• Rust release jobs were missing the format-github-release.mjs step for consistent release note formatting

Changes

1. .github/workflows/rust.yml — Added always() with explicit needs.*.result == 'success' checks to both auto-release and manual-release job conditions, matching the pattern used in the working JS workflow
2. scripts/create-github-release.mjs — Fixed changelog regex to handle both ## 0.22.0 (JS) and ## [0.8.0] - 2026-04-11 (Rust) formats
3. .github/workflows/rust.yml — Added format-github-release.mjs step to both auto-release and manual-release jobs

Evidence

CI run 24273002407 on the most recent push to main:

Job	Result
Changelog Fragment Check	skipped (expected on push)
Lint and Format Check	success
Test (ubuntu/macos)	success
Build Package	success
Auto Release	skipped (the bug)

Full case study: docs/case-studies/issue-247/README.md

Test Plan

• Verified new changelog regex handles both JS and Rust formats via experiments/test-changelog-regex.mjs
• Verified old regex fails for Rust format (confirming the bug)
• CI should pass on this PR
• After merge, the next push to main with Rust changes should trigger the auto-release job (no longer skipped)

[konard]

🤖 Solution Draft Log

This log file contains the complete execution trace of the AI solution draft process.

💰 Cost: $4.009320

📊 Context and tokens usage:

• Context window: 95.2K / 1M (10%) input tokens, 21.3K / 128K (17%) output tokens

Total: (83.6K + 5.9M cached) input tokens, 21.3K output tokens, $4.009320 cost

🤖 Models used:

• Tool: Anthropic Claude Code
• Requested: opus
• Model: Claude Opus 4.6 (claude-opus-4-6)

📎 Log file uploaded as Gist (2082KB)

• View complete solution draft log

---

Now working session is ended, feel free to review and add any feedback on the solution draft.

[konard]

✅ Ready to merge

This pull request is now ready to be merged:

• All CI checks have passed
• No merge conflicts
• No pending changes

---

Monitored by hive-mind with --auto-restart-until-mergeable flag