Let mute rules suppress only during recurring UTC windows, normalize
replica node identity, and fail-open when remotes lack schedule support
so older nodes never keep an all-day scheduled mute after a successful cleanup DELETE.
* feat: add notification suppression rules
* fix: restore label routing and routing test mocks for suppression
* fix: allow bell mute shortcuts for history-only notification categories
Suppression rule validation used the routable category whitelist, which rejected history-only categories such as update_started that appear in the bell during stack updates.
* feat: expand Mute Rules UX with compose-first entry points and activity badges
* fix: add missing NodeContext mocks for notification suppression tests
SaelixCode