Pulls the remaining review feedback into one commit:
- Remove the double _normalize_contact_data call: the helper now assumes
canonical keys, and create_contact normalises before calling it
(update_contact already did). Docstring states the invariant.
- Drop phone/organization from _SUPPORTED_CONTACT_KEYS; they never reach
the unknown-key check post-normalisation.
- Tighten generics to dict[str, Any] / list[str] across helpers and
ContactsClient signatures.
- Comment both URL-merge sites noting only the first URL is written.
- Log a warning when fn is missing from contact_data.
- Test coverage for _wrap_contact_field dropping value-less dicts and
for the fn-missing warning; _vcard helper now mirrors the real call
chain (normalise → build).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
