PR Verification Agent + github action

[YunchuWang]

Summary

What changed?

Why is this change needed?

Issues / work items

• Resolves #
• Related #

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Project checklist

• Release notes are not required for the next release
  • Otherwise: Notes added to CHANGELOG.md
• Backport is not required
  • Otherwise: Backport tracked by issue/PR #issue_or_pr
• All required tests have been added/updated (unit tests, E2E tests)
• Breaking change?
  • If yes:
    • Impact:
    • Migration guidance:

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AI-assisted code disclosure (required)

Was an AI tool used? (select one)

• No
• Yes, AI helped write parts of this PR (e.g., GitHub Copilot)
• Yes, an AI agent generated most of this PR

If AI was used:

• Tool(s):
• AI-assisted areas/files:
• What you changed after AI output:

AI verification (required if AI was used):

• I understand the code and can explain it
• I verified referenced APIs/types exist and are correct
• I reviewed edge cases/failure paths (timeouts, retries, cancellation, exceptions)
• I reviewed concurrency/async behavior
• I checked for unintended breaking or behavior changes

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Testing

Automated tests

• Result: Passed / Failed (link logs if failed)

Manual validation (only if runtime/behavior changed)

• Environment (OS, Node.js version, components):
• Steps + observed results:
  1.
  2.
  3.
• Evidence (optional):

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Notes for reviewers

• N/A

[Copilot]

Pull request overview

Adds an automated PR verification pipeline using a GitHub Copilot agent, intended to pick up PRs labeled pending-verification, run verification against the DTS emulator, and then post evidence / update PR labels.

Changes:

• Adds a new GitHub Actions workflow to run a PR verification agent on label events, on a schedule, or manually.
• Starts a DTS emulator container in CI and provides ENDPOINT/TASKHUB env vars for verification runs.
• Introduces a new Copilot agent definition (pr-verification) describing how to discover PRs to verify, run sample-based verification, and report results.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 4 comments.

File	Description
.github/workflows/pr-verification.yaml	New workflow to trigger the verification agent and manage emulator lifecycle.
.github/agents/pr-verification.agent.md	New agent playbook for finding labeled PRs, running emulator-backed samples, and posting verification reports.