- authz_mixin: add config.extra fallback for group_allowed_chats
when observe-unmentioned mode strips user_id from env-var check
- authz_mixin: check adapter allow_from/group_allow_from for
user authorization from config.yaml without env vars
- telegram/adapter: separate group_allow_from for group chats
vs allow_from for DMs
- telegram/adapter: preserve sender source for command messages
so admin-only slash commands work in groups
- telegram/adapter: add _telegram_extra fallback for
group_allow_from config reading
45fce38b9e