onlyWhenFieldsChange was only an allow-list, so a rule could not say
"purge on any change except this derived counter" without listing every
rendered field. An entry starting with "!" now names an ignored field:
with only ignored entries, any other changed field still purges; with a
mixed list the allow-list applies and ignored fields never count.
Inserts and deletes are unaffected. No schema change.
For kof22: the cms_blog_post rule gets "!viewCount" so the nightly view
count refresh purges nothing (Website-Backend#206).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
james.maesandClaude Opus 5.5