# V4.2.10 – Admin Drop Diversity Fix

## Problem
Admin-generated NFT gifts (`artifact_origin=admin_drop`) could end up visually too close to an already owned winning NFT. In practice this produced near-duplicate collectibles with the same visible theme (for example two very similar `Apex Racer` cards), which weakens the collector value.

## Root cause
The collection prompt already varied by task/winner/seed, but the visible trait selection was still narrow enough that an admin drop could collide with a previously owned card:

- the same high-level theme could be selected again,
- pose and atmosphere could also land close to an earlier card,
- the prompt did not strongly enough enforce cross-card distinctness.

This was not an admin queue problem anymore; it was a *collectible diversity* problem.

## Fix
The artifact generator now adds a collector-aware diversity pass for `admin_drop` items:

1. Before rendering an admin drop, the artifact worker loads up to 128 already-owned ready collectibles for the target owner.
2. Their visible collection traits are re-derived.
3. The new admin drop then deliberately prefers the **least-used** values for:
   - theme
   - pose
   - atmosphere
   - camera / staging
   - palette story
   - scene emphasis
4. The image prompt now includes stronger art-direction sections:
   - `CAMERA / STAGING`
   - `COLOR STORY`
   - `SCENE EMPHASIS`
   - `COLLECTOR UNIQUENESS REQUIREMENT`

This makes admin gifts much less likely to repeat a card the account already owns.

## Scope
Only the collection-artifact path changed. No database migration is required.

## Deployment
Rebuild only:

- `Dockerfile.server`

Customer-Service and Worker images do not need changes for this fix.