Send segmented recruiter emails and update tracking records

Inbound recruitment payloads trigger emails that use inconsistent sender identities, causing recipient confusion and broken tracking. It sends the right sender and logs thread info so coordinators see outreach status same day.

Overview

Branding mismatches and missing thread data make recruitment outreach harder to measure and reduce response rates; routing each send by sender identity fixes that at the source. This sends the appropriate sender, delivers the email, and logs thread metadata so marketing ops and recruiting coordinators see outreach status the same day.