Implement the remaining vcs.Client interface methods for github.Client:
Reviewer:
- PostReview: POST /repos/{owner}/{repo}/pulls/{number}/reviews
- ListReviews: GET /repos/{owner}/{repo}/pulls/{number}/reviews
with state translation (CHANGES_REQUESTED → REQUEST_CHANGES, etc.)
- DeleteReview: DELETE /repos/{owner}/{repo}/pulls/{number}/reviews/{id}
Returns ErrCannotDeleteSubmittedReview on 422
- DismissReview: PUT /repos/{owner}/{repo}/pulls/{number}/reviews/{id}/dismissals
Identity:
- GetAuthenticatedUser: GET /user
Infrastructure:
- Add doRequestWithBody helper for POST/PUT/DELETE with JSON bodies
- Update conformance_test.go: var _ vcs.Client = (*github.Client)(nil)
All unit tests pass including error cases (401, 404, 422, malformed).
claw