feat(release): prepare Neo 0.51.1.3 arm64 test build

[Nikhil (shadowfax92)]

The Neo full-release workflow always starts Linux, Windows and universal macOS builds and promotes its components. This change adds platform, macOS architecture and publication choices, while retaining the existing full-release defaults. The requested test dispatch selects macOS arm64 with publication=draft-only.

Draft-only retains immutable source-bound component objects and private drafts, skips component finalization/feeds/latest aliases/version reflection, and disables explicit and inherited macOS Slack notifications. Finalization accepts skipped unselected lanes and requires every selected lane and component to succeed before creating only the selected browser draft assets. Deferred component attachment also refuses public or foreign-release mutation.

After profile PR #2908 merged as a1eb3115c8e33ed7b7ef6b0ee8aadc05db782adb, the browser PATCH advances exactly once from 0.51.1.2 to 0.51.1.3. No native or Rust profile behavior changes are part of this preparation.

Validation at c899112f8: 1,270 bos_build tests OK (two pre-existing skips), 66 TypeScript release tests pass, Ruff and actionlint pass. One independent workflow review identified deferred public-asset mutation; the fix and the mandatory-metadata follow-up are root-vetted, with shipped-step fake-gh red/green regressions. Exact-head CI will be checked before merge. The default all/universal/alpha path and selected-lane failure/skip behavior are covered, including no public component writes in draft-only mode.

Authorized endpoint: one main-branch macOS arm64 Neo test build and GitHub draft. No live browser/component feeds, stable aliases, Slack/Discord announcement, or owner installation. TKT-1025 findings and the accepted existing-only removal-race caveat from #2908 remain unfixed and explicitly outside this release-preparation change.

[github-actions]

✅ Tests passed: 66/66

Ran 1 of 16 suites (15 not affected by this change).

Suite	Passed	Failed	Skipped
⏩ server-agent	n/a	n/a	not affected
⏩ server-api	n/a	n/a	not affected
⏩ server-tools	n/a	n/a	not affected
⏩ server-browser	n/a	n/a	not affected
⏩ server-integration	n/a	n/a	not affected
⏩ server-lib	n/a	n/a	not affected
⏩ server-root	n/a	n/a	not affected
⏩ agent	n/a	n/a	not affected
⏩ claw-app	n/a	n/a	not affected
⏩ claw-onboard	n/a	n/a	not affected
⏩ app-onboard	n/a	n/a	not affected
⏩ build	n/a	n/a	not affected
✅ release	66/66	0	0
⏩ claw-server	n/a	n/a	not affected
⏩ claw-server-quality	n/a	n/a	not affected
⏩ claw-mcp	n/a	n/a	not affected

View workflow run

[greptile-apps]

Confidence Score: 5/5

[High impact] The PR appears safe to merge; no actionable issues were found.

Summary

Adds platform, macOS architecture, and publication choices for Neo releases while keeping the existing full-release defaults.

• Neo releases can build selected platforms and macOS artifacts.
• Draft-only runs keep component releases private until finalization.
• Neo can mute Slack messages for macOS test builds.

Acknowledged scope: shadowfax92 explicitly deferred the TKT-1025 findings and the existing-only removal-race caveat from #2908. Neither is changed by this PR.

Diagram

%%{init: {'theme': 'neutral'}}%%
flowchart TD
  A[Validate release choices and freeze source] --> B[Prepare server]
  B --> C[Prepare extension]
  C --> D[Check exact component versions]
  D --> E[Build selected browser platforms]
  E --> F[Require selected builds to succeed]
  F --> G[Check selected receipts]
  G --> H[Create browser draft]
  B --> I{Publication choice}
  C --> I
  I -->|alpha| J[Finalize components and publish alpha feeds]
  I -->|draft-only| K[Leave component drafts unpromoted]

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