Assets Items
The trackable units of a serialized Product — one Item per physical unit, with
its own serial_number, status (available/assigned/transit/maintenance/retired),
and purchase metadata.
Bulk Products are not represented here; their counts live in Inventories (per site) and Custodies (per user).
List Items
**Required scope:**
Create an Item (serial)
**Required scope:**
Show an Item
**Required scope:**
Update an Item
**Required scope:**
Delete an Item
**Required scope:**