- Remove duplicate _setup_feishu() definition (old 3-line version left
behind by cherry-pick — Python picked the new one but dead code
remained)
- Remove misleading 'Disable direct messages' DM option — the Feishu
adapter has no DM policy mechanism, so 'disable' produced identical
env vars to 'pairing'. Users who chose 'disable' would still see
pairing prompts. Reduced to 3 options: pairing, allow-all, allowlist.
- Fix test_probe_returns_bot_info_on_success and
test_probe_returns_none_on_failure: patch FEISHU_AVAILABLE=True so
probe_bot() takes the SDK path when lark_oapi is not installed