feat: add createCheckRun for Check Runs API

[HarshMN2345]

Add createCheckRun() method to post a completed check run with a given conclusion (neutral, success, failure, etc.) using the GitHub Check Runs API, which supports richer conclusions than the legacy Commit Status API.

[greptile-apps]

Greptile Summary

This PR adds three new methods — createCheckRun, getCheckRun, and updateCheckRun — to both the base Adapter class and the GitHub implementation, enabling use of the richer GitHub Checks API alongside the existing commit-status API.

• createCheckRun / updateCheckRun correctly guard status=completed ↔ conclusion consistency, auto-populate completed_at when a conclusion is provided, require both output.title and output.summary before sending the output block, and check HTTP response codes in all three methods.
• Tests cover in-progress runs, completed one-shot runs, invalid-repository/ID error paths, and the missing-conclusion guard using finally blocks for cleanup.
• Minor docblock drift: the base-class createCheckRun comment still advertises only queued/in_progress statuses, while the signature (and GitHub override) already support completed + conclusion directly. The updateCheckRun docblock in GitHub.php is also missing the @param $actions entry.

Confidence Score: 5/5

Safe to merge — all three new methods handle the GitHub Checks API constraints correctly and the integration tests cover the main failure paths.

All the substantive issues raised in earlier review rounds have been addressed in this revision. The only remaining findings are docblock inaccuracies that do not affect runtime behavior.

The createCheckRun docblock in src/VCS/Adapter.php still describes a narrower interface than what is implemented, which could mislead future callers.

Important Files Changed

Filename	Overview
src/VCS/Adapter.php	Adds createCheckRun, getCheckRun, and updateCheckRun default methods. Signatures now match the GitHub override, but the createCheckRun docblock still describes a narrower contract than what the method supports.
src/VCS/Adapter/Git/GitHub.php	Implements createCheckRun, getCheckRun, and updateCheckRun for the GitHub Checks API. Guards for conclusion/status consistency are in place, completed_at is auto-set, HTTP error codes are checked in all three methods, and the output block requires both title and summary before inclusion.
tests/VCS/Adapter/GitHubTest.php	Good integration-test coverage including happy paths, invalid-repository/id cases, completed check runs, and the missing-conclusion guard. All tests use finally blocks to clean up created repositories.

_{Reviews (12): Last reviewed commit: "fix: guard against status=completed with..." | Re-trigger Greptile}

[Meldiron]

Lets avoid doing that - lets something we can assert.

If there is nothing, lets also add getCheckRun

[Meldiron]

also has text, annotations, images..