Implement Lane E canonical rebuild single-writer flow#34
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Am1n3e merged 2 commits intofeature/add-leaderboardfrom Mar 7, 2026
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Switch leaderboard publishing to canonical submissions with deterministic retention and manifest-last root artifacts so rebuilds stay consistent and branch-scoped.
Align canonical loader typing with integer submission IDs and update retention fixtures to the canonical schema required by Lane D records.
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Summary
Leaderboard Rebuildworkflow that runs on finalize success (workflow_run) or manual dispatch with single-writer concurrency (leaderboard-data-writer).submissions/*.json, prune to latest 100 byeval_completed_at_utc/submission_id, and publish branch-root artifacts with manifest-last semantics.dev.leaderboard.rebuild-canonical, update the rebuild runbook, and add tests for retention ordering and deterministic rebuild outputs.Testing
uv run pytest tests/leaderboard/test_publish_atomic.py tests/leaderboard/test_rebuild_retention.py tests/types/test_leaderboard_types.pyuv run ruff check dev/leaderboard/publish.py dev/leaderboard/tasks.py tests/leaderboard/test_rebuild_retention.py