7cc1c08943
Add vcs/interfaces.go and vcs/types.go as the foundation for multi-platform VCS support. Interfaces are discovered from working gitea/client.go code, not invented in a vacuum. vcs/interfaces.go — role-based interfaces: - PRReader: GetPullRequest, GetPullRequestDiff, GetPullRequestFiles - FileReader: GetFileContent (path + ref), ListContents - Reviewer: PostReview (ReviewRequest), ListReviews, DeleteReview - Identity: GetAuthenticatedUser - Client: all four composed vcs/types.go — types extracted from gitea/: - PullRequest, ChangedFile, ContentEntry, Review (identical to gitea/) - ReviewComment: uses GitHub diff-position convention (Position int, CommitID string) instead of Gitea's NewPosition int64 - ReviewRequest: new type wrapping Body, Event, Comments vcs/check.go (//go:build ignore) — documents the gaps gitea.Client must bridge in Phase 2: 1. PostReview signature mismatch (event+body+[]ReviewComment vs ReviewRequest) 2. GetFileContent missing ref parameter 3. ReviewComment type mismatch (NewPosition vs Position/CommitID) No behavior changes. All existing tests pass.