Project sites can pass a TOML file of edge rules (redirects, status
codes, blocking, response headers, cache times) to the deploy action.
The gateway validates them when a deployment starts and reconciles its
own rules on the site's Pull Zones when it finalizes, deleting dropped
rules and purging when a rule changed. Actions that could reach beyond
the site, such as origin changes, are not available.
The purge retry is limited to recorded purge failures, so a deployment
whose rules failed to apply cannot be completed by a purge alone.
