- Update test_observed_group_context_preserves_slash_command_text_for_dispatch
to assert user_id is preserved for COMMAND messages (new correct behavior)
- Add _coerce_allow_set helper to handle both list and comma-separated
string allowlist inputs (prevents character-by-character iteration bug)
- Include 'channel' in chat_type checks for group-scoped authorization
- Add _telegram_extra fallback for group_allowed_chats (consistent with
group_allow_from fallback)
- Add AUTHOR_MAP entry for nyaruko@hermes -> tsuk1nose
