Everything that arrived, most recently noticed first — a relayed notification, a mail
candidate, a feed item, a changed page, a spend, a presence probe. Maven's own bookkeeping writes (feed
watermarks, crawl hashes, act traces, settings he toggled) are not here: nothing arrived. noticed
is when the journal saw it, happened is when the thing itself did, and those differ by days on a
cold feed read. One envelope per write; the durable row is still the fact, note or task itself. Held in
memory only, so a restart empties this.