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).
- MAJOR #1: Replace panic in doRequest with safe default fallback.
Validation now happens in SetRetryBackoff (returns error on invalid
length). doRequest gracefully falls back to default backoff if the
configured slice is somehow invalid.
- MINOR #2: SetRetryBackoff validates slice length at configuration
time, making the coupling between maxRetryAttempts and backoff
explicit and catching mismatches early with a clear error.
- MINOR #4: Reword oversized response error to remove '(truncated)'
which implied truncated data was returned when actually only an
error is returned.
- MINOR #5: Functional options kept as-is - idiomatic Go pattern
that allows future growth without breaking the API.
Address review feedback on PR #101:
1. Capture resp.StatusCode and Retry-After header *before* passing resp
to handleResponse, making ownership transfer explicit. Previously the
caller read resp.StatusCode after handleResponse had closed the body —
correct but fragile coupling.
2. Add panic guard ensuring backoff slice length equals maxAttempts-1.
Previously the relationship was implicit and could silently break if
maxAttempts were changed without updating the default backoff.
Add GitHub API client with configurable base URL and GHE support,
HTTP helpers with 429 retry and Retry-After handling.
Also adds Patch field to vcs.ChangedFile.
Part 1 of 3 for #80.