Refresh local git status on turn completion

[juliusmarminge]

Summary

• Refreshes only the cached local git status when a provider turn completes, using the session CWD.
• Wires turn completion handling in CheckpointReactor to trigger a local status refresh without forcing a full status recompute.
• Adds coverage for the new local-refresh path and updates git status broadcaster tests for cache invalidation behavior.

Testing

• Not run (PR description only).
• Existing test coverage added in apps/server/src/orchestration/Layers/CheckpointReactor.test.ts for turn completion refresh behavior.
• Existing test coverage added in apps/server/src/git/Layers/GitStatusBroadcaster.test.ts for local snapshot refresh and cache invalidation.

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Note

Medium Risk
Touches turn completion handling in CheckpointReactor and git status caching behavior, which can affect UI/status freshness and checkpoint flow timing. Failures are caught and only warn, but incorrect CWD normalization or session resolution could cause missed/extra refreshes.

Overview
On provider turn.completed, CheckpointReactor now triggers a local-only git status cache refresh via GitStatusBroadcaster.refreshLocalStatus(session.cwd) before capturing the post-turn checkpoint; refresh failures are logged and do not block checkpointing.

GitStatusBroadcaster adds a new refreshLocalStatus(cwd) API (including CWD normalization) to invalidate/reload just the local snapshot without forcing a remote refresh, with new test coverage validating local-only invalidation and updated harnesses stubbing the new service dependency.

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Note

Refresh local git status on turn completion in CheckpointReactor

• Adds refreshLocalStatus(cwd) to the GitStatusBroadcasterShape interface and implements it in GitStatusBroadcasterLive, normalizing the cwd before invalidating and reloading the local git status cache.
• On turn.completed events, CheckpointReactorLive now calls gitStatusBroadcaster.refreshLocalStatus with the session cwd before capturing a checkpoint; failures log a warning and do not block the checkpoint.
• Test harnesses for both CheckpointReactor and the orchestration integration layer are updated to inject a stub GitStatusBroadcaster that records refreshLocalStatus calls.

^{Macroscope summarized 883489c.}

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[macroscopeapp]

Approvability

Verdict: Needs human review

This PR adds new automatic runtime behavior that triggers git status refresh on every turn completion. While well-tested and authored by a primary contributor to these files, the addition of new observable behavior that runs automatically warrants human review.

No code changes detected at 883489c. Prior analysis still applies.

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