Sequence Load Skill

<quick_start> Trigger: Monday 7:15 AM ET (runs after prospect-refresh at 6:30 AM)
Manual Trigger: "Load prospects into sequences" or "Enroll new leads"
Dependencies: Requires Apollo credits, prospect-refresh output, HubSpot portal 21530819
Output: Enrollment confirmation per prospect, sequence assignment, contact IDs for HubSpot creation </quick_start>