create_contact previously read only fn/email/tel from contact_data and
silently dropped org, organization, note, title, nickname, bday,
categories, url — and didn't accept phone as an alias for tel, so the
reporter's exact call lost every field except fn and email. Introduce
_build_contact_from_data, share it with update_contact's fallback, and
normalise str→list inputs so pythonvCard4 doesn't iterate bare strings
character-by-character for list-typed properties.
Closes#716
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
