Add a contact channel to a company or person.
Wraps the resource-scoped REST endpoints (POST /v1/{companies,people}/:id/{emails,phones,web-links,locations}).
channel + the matching value field:
- email → value.email
- phone → value.e164_number (E.164; a leading "+" is added if missing)
- web_link → value.url (+ optional value.platform, default "website")
- location → value.city, value.country (+ optional address_line1/2, region, postal_code)
value.label is optional (defaults to "work").
NOTE: adding a phone is supported on a PERSON but NOT on a company (no endpoint) —
that combination returns a clear error. To READ existing channels, use
well_query_records on the parent (companies/people) or the channel root.
Connector