ADR 0359 asked for a stream of its own and a bus grant from the module's
grants; ADR 0363 built both. The events leave the shared EVENTS stream, and
one family pattern per change replaces the literal per-account emits, so a
new account changes no manifest.
ADR 0359 decided one module holds the operator's mail accounts. This is its
first stage: an imap adapter that keeps IDLE on the inbox and polls the other
folders read-only, indexes each message in its own database, keeps each
attachment once by its SHA-256 in its bucket, and says every added, changed or
removed message as a metadata-only event. Bodies and attachments are served
only by its tools, to callers the trusted setting grants names. Its health
waits for the account's own secret until it is given at the desk (issue 710).
jochen