fix: complete fail-closed closure delivery

[calltelemetry-jason]

Summary

Completes the fail-closed Linear close contract before publishing 0.9.28.

Changes

• route read-only closure report generation through the embedded streaming runner
• reject Linear activity mutations unless agentActivityCreate.success is exactly true
• normalize partial and null GraphQL activity failures
• replace the new closure regression fixed delay with an event-driven completion signal
• rebuild committed distribution artifacts and bump package/plugin metadata to 0.9.28

Testing

• npm run build
• npm run typecheck
• npx vitest run src/api/linear-api.test.ts src/pipeline/webhook.test.ts — 207 passed
• npm test -- --run — 43 files, 1,213 tests passed
• npm run test:coverage — 89.45% statements, 81.04% branches
• npm pack --dry-run --json — valid 0.9.28 package
• independent Codex review — clean
• CodeRabbit CLI — 0 findings on final head
• Gemini high-thinking review — reviewed; reported concerns triaged against passing tests and existing caught streaming emissions

Checklist

• No secrets or credentials included
• openclaw doctor passes after changes — deferred until released package is installed
• Tested with a simulated Linear webhook

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📥 Commits

Reviewing files that changed from the base of the PR and between 1277272 and e389fa3.

⛔ Files ignored due to path filters (3)

• dist/src/api/linear-api.js is excluded by !**/dist/**
• dist/src/pipeline/webhook.js is excluded by !**/dist/**
• package-lock.json is excluded by !**/package-lock.json

📒 Files selected for processing (6)

• openclaw.plugin.json
• package.json
• src/api/linear-api.test.ts
• src/api/linear-api.ts
• src/pipeline/webhook.test.ts
• src/pipeline/webhook.ts

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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