Mutation - addCampaignPeopleList

Adds a pasted list of names and emails to the campaign's table as rows with planned recipients. CRM contacts link to their person; other emails become rows without a CRM record. Every entry must resolve first (preview with previewCampaignPeopleList). People who already have a row are skipped. Added people join an approved audience; before the audience pipeline has run, they become the approved audience. Does not send email. Access: caller must have CRM access to the campaign workspace. Errors: a live build, or a list with unresolved, ambiguous or invalid entries, is rejected.