Paste cost-basis data from a Dropbox spec sheet, vendor quote, or wherever it lives. Each entry stages
one proposed_action for HITL approval. On approval, pricing_master.cost_basis fills for every
row matching the item code (optionally scoped to one school year).
After staging
Each entry creates a pending row inproposed_actions. To bulk-approve from chat:"Bulk approve all bulk_cost_basis actions I just staged" — or call
propose_bulk_approve({action_type: 'bulk_cost_basis', dry_run: false}).