Team mode shares one disk per Space. export/bot walked the entire
team home, so a member exporting their own bot received every other
member's workspace files too.
Scope exportHome with the exporting bot's bots/<id>/ prefix and add
regression coverage for the shared-Space case.
Co-authored-by: cynarAI <cynarAI@users.noreply.github.com>
Group inbound webhooks often report only the sender in participants,
not the full roster. Sweeping on any non-empty list incorrectly marked
approved members as left, silently dropping them from channel fan-out.
Gate the sweep on participantsAuthoritative so adapters opt in only when
the provider supplies a complete roster.
Co-authored-by: cynarAI <cynarAI@users.noreply.github.com>
