fix(phase-0): resolve import paths and add backward compatibility test

- Fix TypeScript import paths to use relative imports instead of aliases
- Add comprehensive backward compatibility test script
- Verify existing functionality works correctly:
  * Legacy /api/track endpoint: ✅
  * /api/v1/track POST endpoint: ✅
  * /api/v1/track GET endpoint: ✅
- Ready for Docker testing of new TypeScript implementation

.env

@@ -0,0 +1,23 @@
+# Database
+DATABASE_URL="postgresql://postgres:postgres@localhost:5432/redirect_intelligence"
+
+# Redis
+REDIS_URL="redis://localhost:6379"
+
+# API
+PORT=3333
+NODE_ENV=development
+JWT_SECRET="your-super-secret-jwt-key-change-in-production"
+
+# Frontend
+WEB_URL="http://localhost:3000"
+REACT_APP_API_URL="http://localhost:3333"
+
+# Optional: Google Safe Browsing API
+GOOGLE_SAFE_BROWSING_API_KEY=""
+
+# Logging
+LOG_LEVEL=info
+
+# Worker
+WORKER_CONCURRENCY=5