Send updated onboarding link to candidate when record changes

Hiring table updates can let candidate messages be missed, leaving forms unsigned and start dates delayed. Candidates receive the right onboarding link same day so paperwork completes before onboarding.

Overview

Stop manual outreach and late paperwork by sending the correct onboarding link automatically when candidate records change. Recruiters and HR ops get a visible message-sent flag and same-day delivery so new hires complete forms before their start date.