Move closed jobs to the ready-to-invoice board list

Your closed jobs wait unbilled when project cards lack billing context and stay in open lists. Cards get moved into the billing-ready list so billing staff can prepare invoices same day.

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Overview

When closed jobs sit in general project lists, billing doesn't see a prioritized queue and invoices get delayed. Move closed jobs into a billing-ready list automatically so project coordinators and billing staff can prepare invoices the same day.