Add an append-only execution ledger with one fold task every 5 seconds.
Participants fold claimed rows in one transaction: workflow statistics,
execution quota usage, and Insights hourly buckets.
Add hard execution quotas per workflow and project. An atomic Redis or
memory counter admits a run, and the started row commits with the
execution row. Postgres and SQLite are both supported.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
