- Remove legacy DiscordNewSessionCommand/Handler and their tests.
- Rename /newsession-wizard to /newsession.
- Add shared pool capacity step before Format/Location.
- Render Format and Location in Discord wizard; Location uses a modal.
- Propagate Format, JoinLink and LocationAddress in BuildCommand.
- Publish created sessions through existing IPlatformMessenger pipeline.
- Update README, version bump to 3.11.1, sync compose/deploy/NavMenu.