The admin_todos table is written by 8 worker handlers (and the new shared
create_admin_todo helper) but had NO CREATE migration anywhere, so every
fulfillment-task insert silently failed in environments without the table.
Define it with the exact column set the handlers use, plus status/priority/
order indexes and operator workflow columns (assigned_to, notes, completed_at).
Applied 076,085,086,088,089,090,091 to the dev DB (all idempotent); verified
admin_todos, esign_records, paper_filing_batches, compliance_orders.
fulfillment_status, and esign_records.signature_vector all exist and accept the
handler insert shape.
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