Speed up timeline load with portrait thumbs, bootstrap API, and caching.

Add catalog bootstrap endpoint, portrait thumbnail pipeline, lazy queued timeline images, gzip compression, and 3D texture throttling with code-split VirtualGallery.

package.json

@@ -13,6 +13,7 @@
     "fetch-artist-bios": "node scripts/fetch-artist-bios.js",
     "sync-image-paths": "node scripts/sync-image-paths.js",
     "regenerate-thumbnails": "node scripts/regenerate-thumbnails.js",
+    "regenerate-portrait-thumbs": "node scripts/regenerate-portrait-thumbs.js",
     "audit-painting-images": "node scripts/audit-painting-images.js",
     "expand-catalog": "node scripts/expand-paintings.js",
     "update-influences": "node scripts/update-influences.js",
@@ -55,6 +56,7 @@
   "dependencies": {
     "bcryptjs": "^3.0.3",
     "connect-pg-simple": "^10.0.0",
+    "compression": "^1.8.1",
     "cors": "^2.8.6",
     "dotenv": "^17.4.2",
     "express": "^5.2.1",