fix: prevent duplicate uploads and group asset commits

lib/types.ts

@@ -2,6 +2,8 @@
 // Shared types
 // ---------------------------------------------------------------------------
 
+import type { AssetCategory } from './asset-classification'
+
 export interface ParsedFile {
   filename: string
   buffer: Buffer
@@ -19,3 +21,10 @@ export interface RemoteFile {
   name: string
   size: number
 }
+
+export interface PreparedAssetSummary {
+  filename: string
+  kind: 'model' | 'texture' | 'asset'
+  category?: AssetCategory
+  compressed: boolean
+}