Checkpoints v2: Push v2 refs in parallel and clean up output

[computermode]

https://entire.io/gh/entireio/cli/trails/277

Push v2 checkpoints in parallel + reduce verbosity in output messaging.

[entire] Pushing v2/main to dogfood....
[entire] Syncing v2/main with remote.......... done
[entire] Pushing v2/main to dogfood...... done
[entire] Pushing v2/full/current to dogfood....
[entire] Syncing v2/full/current with remote........ done
[entire] Pushing v2/full/current to dogfood...... done
[entire] Pushing v2/full/0000000000023 to dogfood....
[entire] Syncing v2/full/0000000000023 with remote........... done
[entire] Pushing v2/full/0000000000023 to dogfood...... done

➜  test-repo git:(main) ✗ git push origin hEAD
[entire] Syncing and pushing v2 checkpoints...
[entire] Pushing v2/main, v2/full/current...
[entire] All v2 checkpoints pushed

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Note

Medium Risk
Moderate risk because it changes the checkpoint push flow to run ref pushes concurrently and alters recovery/error reporting; concurrency could surface racey git/working-dir assumptions or make failures harder to reproduce.

Overview
Updates v2 checkpoint pushing to sync/push v2/main, v2/full/current, and the latest archived generation concurrently, replacing per-ref progress spam with a single aggregated header, per-ref warnings, and a final success message.

Refactors the v2 push path to return structured results (v2RefPushResult) and perform fetch+merge recovery per ref without emitting interleaved output, and adds --no-write-fetch-head to checkpoint git fetch calls to avoid updating FETCH_HEAD.

Tests are updated to capture stderr and assert the new aggregated messaging, and add coverage that failed pushes still name the specific ref that couldn’t be synced/pushed.

^{Reviewed by Cursor Bugbot for commit fb95c19. Configure here.}

[Copilot]

Pull request overview

This PR updates the v2 checkpoint pre-push behavior to reduce noisy per-ref progress output and speed up pushing by pushing multiple v2 refs concurrently.

Changes:

• Push v2 refs (v2/main, v2/full/current, latest v2/full/<generation>) in parallel and emit aggregated, less-verbose stderr output.
• Add --no-write-fetch-head to v2 fetch operations used during conflict recovery to avoid writing FETCH_HEAD.
• Expand test coverage to assert the new aggregated output format and to ensure failures still name the ref that failed.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
cmd/entire/cli/strategy/push_v2.go	Parallelizes v2 ref pushing and consolidates user-facing output; adjusts fetch options to avoid writing FETCH_HEAD.
cmd/entire/cli/strategy/push_v2_test.go	Adds assertions for aggregated output and a new test ensuring failures still identify the failed ref.