Extend the merged /buzz/v1 read-state wire with the minimum the follow
model needs:
- `follow` / `unfollow` intents on a thread target. An unfollow sticks
until the actor posts in the thread or is mentioned there again.
- `GET /me/threads`: followed threads in joined channels, newest reply
arrival first, cursor-paged, at most 50 per page.
- Thread rows count `mentions` as direct mentions only.
- Broadcast replies count on the channel timeline and are valid channel
anchors.
- NIP-11 advertises `capabilities: ["follow","threads"]` and `max_threads`.
Migration 0061 adds `events.read_timeline`, `thread_metadata.received_at`
and `personal_read_frontiers.unfollowed`, plus arrival-ordered partial
indexes so the sidebar and threads view probe an index per channel and
per follow instead of scanning a bounded window. No backfill.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Bradley Axen <baxen@squareup.com>
4da2b9f4e4