## What changed
- Share an in-flight `git status --porcelain` invocation among concurrent workspace metadata requests for the same canonical repository root.
- Keep scans for different repositories independent, and start a fresh scan after an in-flight request completes or loses all consumers.
- Pass the known repository root into dirty-worktree detection so requests from sibling directories and symlink aliases use the same key.
## Testing
- Add coverage for request coalescing, repository and symlink keying, completed scans, and consumer cancellation.
GitOrigin-RevId: 4c197c1d5bb94ca83c02979be34b17f24aefde08
