[janbjorge]

Summary

• QueueManager and PgQueuer expose write_job_ends and unwritten_job_logs. runit replays that list around each cycle through UnwrittenJobLogs.
• A scheduler has neither, so the supervisor does not branch on manager type.
• The list stays empty. The next PR is what fills it when a shutdown flush fails.

Testing

• uv sync --frozen && uv run ruff check . && uv run ruff format . --check && uv run lint-imports && uv run mypy . && uv run pytest passed
• test_pgqueuer_carries_the_queue_managers_unwritten_job_logs shows PgQueuer and QueueManager carry the list, and a scheduler does not
• test_unwritten_job_logs_stay_held_when_the_write_fails keeps the ends and does not run the body
• test_unwritten_job_logs_capture_what_the_run_could_not_write replaces the held ends with what the run left
• uv run ruff check, uv run mypy, and uv run lint-imports passed on the touched files

Checklist

• I have read the Contributing Guide
• I have added or updated tests
• I have updated documentation if necessary