Assets Inventories

On-hand counts at a site. Each row is the pair (item, site) with a quantity_on_hand.

Auto-created when stock arrives at a site (via Restocks or Transfers) and auto-destroyed when the quantity hits zero — there is no "empty inventory" row.

Use this to answer "what's currently at this site?". For per-user possession, see Custodies; for the audit trail of how stock got there, see Transactions.