Development record

`.abcd/development/brief/04-surfaces/11-history.md:208-210` says a pending transcript the session start cannot place stays pending and unredacted until a later start can place it or an operator discards it, and `.abcd/development/brief/04-surfaces/11-history.md:95` describes draining only as redacting and storing staged transcripts. `abcd history drain` also places pending transcripts first (`placePendingNotices`, `internal/surface/cli/history.go:392`), so one can be filed and stored with no session start. `commands/history.md:66` states this; the chapter does not.