Adds 15 regression tests for hermes_cli/dingtalk_auth.py covering:
* _api_post — network error mapping, errcode-nonzero mapping, success path
* begin_registration — 2-step chain, missing-nonce/device_code/uri
error cases
* wait_for_registration_success — success path, missing-creds guard,
on_waiting callback invocation
* render_qr_to_terminal — returns False when qrcode missing, prints
when available
* Configuration — BASE_URL default + override, SOURCE default
Also adds a one-line disclosure in dingtalk_qr_auth() telling users
the scan page will be OpenClaw-branded. Interim measure: DingTalk's
registration portal is hardcoded to route all sources to /openapp/
registration/openClaw, so users see OpenClaw branding regardless of
what 'source' value we send. We keep 'openClaw' as the source token
until DingTalk-Real-AI registers a Hermes-specific template.
Also adds meng93 to scripts/release.py AUTHOR_MAP.
