feat: добавить генерацию image variants

- добавлен shared config presets, custom transforms и allowlist hosts
- реализованы Backend endpoints для assets, presets и variants
- добавлена orchestration через PostgreSQL, RabbitMQ, S3 и worker
- обновлён Gateway read-through flow с L1 cache и корректным Vary: Accept
- добавлена миграция resize_mode для variants lookup
- обновлены dev scripts, env template, lockfile и документация

apps/worker/package.json

@@ -2,18 +2,19 @@
   "name": "@image-platform/worker",
   "version": "0.1.0",
   "private": true,
-  "type": "module",
   "scripts": {
     "build": "tsc -p tsconfig.build.json",
-    "dev": "tsx watch src/main.ts",
-    "start": "node dist/main.js",
+    "dev": "node --env-file-if-exists=../../.env ./node_modules/tsx/dist/cli.mjs watch src/main.ts",
+    "start": "node --env-file-if-exists=../../.env dist/main.js",
     "typecheck": "tsc --noEmit -p tsconfig.json"
   },
   "dependencies": {
     "@image-platform/database": "workspace:*",
+    "@image-platform/image-config": "workspace:*",
     "@image-platform/queue": "workspace:*",
     "@image-platform/storage": "workspace:*",
-    "amqplib": "^1.0.4"
+    "amqplib": "^1.0.4",
+    "drizzle-orm": "^0.45.2"
   },
   "devDependencies": {
     "@types/amqplib": "^0.10.8",