Add "last worn date" attribute to items db view

[rak3rman]

Description

Add an additional attribute to the items_extended materialized database view called "lastWorn". The last worn attribute should return an ISO date of when this particular item was last worn in an outfit for this user. If there are no outfits associated with this item, null should be returned. Make sure the authorUsername attributes match. See previous draft of this feature in Github: https://github.com/radicalplatforms/shafa/blob/376d182b58db59461a463c1f5ae5427bfa4109e6/hono/src/service/items.ts#L32

Acceptance Criteria

Generated by Zenhub AI

• [ ] Scenario: Add "last worn date" attribute to items db view
  • Given the user has an item in their closet
  • When the user checks the "last worn date" attribute for the item
  • Then the attribute should return an ISO date of when the item was last worn, or null if there are no outfits associated with the item
  • And the authorUsername attribute should match the user's authorUsername