ADR 0656 §7 and design 47 (The delivery record): the gate asks the bus module for a ledger
`records` (template ledger, capped at 768 MiB) with two types: a record, keyed by its milestone and
its heads, whose operations open it, write its group state, trace, outcomes, nodes away, pinned
revisions and end, and remove it; and a month's list of the records opened, since a bundle cannot
list a ledger's instances. An open of heads already recorded leaves the record as it is, an outcome
applied twice writes nothing, and each open removes the records past the setting record-retention
(90 days by default), naming each revision they pinned. The layout is the gate's own (design 20).
Claude-Session: https://claude.ai/code/session_01JG73KEq4zoDfM9WtYpcQgZ
(Joined from 84eda463.)
Builds: design 47 G §141, §142, §143, §144, §145, §146, §155, §34 (GATE1)
Claude-Session: https://claude.ai/code/session_01JG73KEq4zoDfM9WtYpcQgZ
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