Move document_records duty-slot writes into docgov, project ledger
heads through docgov/freedoc ports, and workspace deliverable I/O
through DeliverableStore so arch-check baseline drops to sql_write:1
path:13.
Optional reviewer/approver duties leave UserID=0; writing 0 into
document_records FK columns failed with SQLSTATE 23503. Align create
path with docduty nullIfZero and surface ensureUser failures in logs.
Co-authored-by: Cursor <cursoragent@cursor.com>