🐛 fix(cors): compile shared-nestjs-cors to JavaScript for production

The shared-nestjs-cors package was exporting raw TypeScript files, which caused
runtime errors in production Docker containers:
  SyntaxError: Unexpected token 'export'

Changes:
- Add build script to compile TypeScript to JavaScript
- Update package.json to export compiled dist files instead of src
- Add build step to all backend Dockerfiles that use this package
- Package now builds to CommonJS in dist/ folder

Fixes staging deployment failures for mana-core-auth and other backends.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

packages/shared-nestjs-cors/package.json

@@ -2,15 +2,16 @@
 	"name": "@manacore/shared-nestjs-cors",
 	"version": "0.0.1",
 	"private": true,
-	"main": "./src/index.ts",
-	"types": "./src/index.ts",
+	"main": "./dist/index.js",
+	"types": "./dist/index.d.ts",
 	"exports": {
 		".": {
-			"types": "./src/index.ts",
-			"default": "./src/index.ts"
+			"types": "./dist/index.d.ts",
+			"default": "./dist/index.js"
 		}
 	},
 	"scripts": {
+		"build": "tsc",
 		"type-check": "tsc --noEmit",
 		"test": "jest",
 		"test:watch": "jest --watch",