ci: allow macOS prepublish gate 25 minutes

[ictechgy]

Summary

• raise only the macOS prepublish step timeout from 18 to 25 minutes
• pin the job-scoped workflow contract to the new budget
• refresh the closed production-surface inventory digest for the workflow byte change
• leave Ubuntu, release smoke, Swift, and npm publish budgets unchanged

Evidence

PR #283 run 31088395364 reached the existing hard timeout after 18 minutes while Linux 3.11 and 3.12 passed. Earlier successful macOS runs needed up to 16m26s, so the old budget had insufficient runner-variance headroom.

Verification

• python3 -B -m unittest tests.test_workflows (8 passed)
• python3 -B -m unittest tests.test_contextguard_stage2_feasibility (3 passed)
• git diff --check

[ictechgy]

@coderabbitai review

[coderabbitai]

📝 Walkthrough

Walkthrough

The macOS prepublish release-gate timeout increases from 18 to 25 minutes. The workflow test expectation changes to match the new timeout.

Changes

macOS prepublish timeout

Layer / File(s)	Summary
Update timeout and validation .github/workflows/ci.yml, tests/test_workflows.py	The macOS prepublish step timeout and its test expectation change from 18 to 25 minutes.

Estimated code review effort: 1 (Trivial) | ~3 minutes

Possibly related PRs

• ictechgy/context-guard#284: Updates the same macOS prepublish timeout and test expectation.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the macOS prepublish gate timeout increase to 25 minutes.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch ci/macos-prepublish-timeout-25

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[coderabbitai]

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