feat: align RU validation, error contract, and generator runtime templates

Wire DSL-derived field labels, safe API error JSON (string|string[]), decimal/enum DTO fixes, and client dataProvider without comma-splitting. Add generation/templates/runtime as canonical source copied on generate; extend AID bundle, prompts, validation gate, and docs.

server/package.json

@@ -11,7 +11,7 @@
     "start": "nest start",
     "start:dev": "nest start --watch",
     "start:debug": "nest start --debug --watch",
-    "start:prod": "node dist/src/main.js",
+    "start:prod": "node dist/main",
     "lint": "eslint \"{src,apps,libs,test}/**/*.ts\" --fix",
     "test": "jest",
     "test:watch": "jest --watch",
@@ -31,6 +31,8 @@
     "@nestjs/core": "^10.0.0",
     "@nestjs/platform-express": "^10.0.0",
     "@prisma/client": "^5.22.0",
+    "class-transformer": "^0.5.1",
+    "class-validator": "^0.14.1",
     "jose": "^6.2.2",
     "reflect-metadata": "^0.2.0",
     "rxjs": "^7.8.1"