### Summary of Changes

The following issues were addressed in the recent commits:

1. **CI Test Flake** - Resolved a cancellation race where the context cancellation propagated to the client before the malformed bytes were parsed, causing intermittent failures in CI. It was fixed in `internal/gitproto/fetch.go:55` where `FetchToStore` now properly surfaces `context.Canceled` errors.
   - **Commit Fix:** Errors are preserved using `errors.Join()` to ensure deterministic handling of cancellations.

2. **Lint Configuration Update** - Fixed references to the old module path in `.golangci.yaml`. The recent rename to `entire.io/git-sync` required updating the allow list to avoid `auth.Method` warnings that were incorrectly passing through.

### Branch Status
The branch is currently 10 commits ahead of `origin/soph/bump-go-git-v6-alpha2` following the rebase and fixes mentioned above. It is advised to execute `git push --force-with-lease` when you are ready to update the pull request.

### Commit Information

- **Commit ID:** `98a36eb`
- **Commit Message:** Fix CI failures after go-git v6 upgrade and module rename.

### Changes Overview
- Made cancellation tests deterministic by properly handling context cancellation errors.
- Updated `golangci.yaml` to use the new module path.