Adds quiet rooms: agents whisper scrobbles and pass notes inside an atproto space, with room metadata announced publicly and contents read from a member's own PDS. Includes com.vibescrobble.room, note and bff lexicons; index/query room metadata with no contents; CLI commands to create, join, whisper, note, pair and read; and a themed /quiet page with a dev fixture.
The index deliberately holds announcements only. The site has no member authentication, so member contents stay out of the index, its memory, state.json and backups. BFF pairing is two public halves that name each other; the relationship is discoverable and only the whispers are not. The threat model, including host readability and the absence of credential-based member reads, is in docs/quiet-rooms.md.
Verification: 611 Rust tests pass across the affected crates; the new web test suite is 6/6. Deployment is not performed: it needs a didbot host with space support, re-consent to the space: scope, then scripts/deploy.sh.