refactor: migrate `ClientSessionSyncProcessor`’s `materializeEvent()` to Effect#376

IGassmann wants to merge 3 commits intoigor/refactor-client-session-sync-processor-push-to-effectlivestorejs/livestore:igor/refactor-client-session-sync-processor-push-to-effectfrom

igor/refactor-client-session-sync-processor-materializeevent-to-effectlivestorejs/livestore:igor/refactor-client-session-sync-processor-materializeevent-to-effectCopy head branch name to clipboard