Summary

• add --all-users to the existing kernelbot-admin validate-top10 command
• pass the manual scope through the admin API and validation service
• select every ranked user's current best submission for an all-users sweep
• keep scheduled sweeps capped at the top 10 users and concurrency capped at two
• require no Kernelboard change; existing validation joins already work for every rank

Why

Cholesky currently has 93 ranked users. This provides a controlled one-time backfill so every current best submission can receive a validation annotation without expanding the nightly workload.

Validation

• PYTEST_MODAL_ENV=pytest uv run pytest tests/ -v — 260 passed, 7 skipped
• focused all-users/API/CLI coverage — 11 passed
• all hosted lint, unit, GitHub integration, and Modal integration checks passed
• Ruff on all changed Python files
• git diff --check
• CLI help confirms --all-users