chore: add processed data, outputs, and proposal

- Add processed/ ML features and GCN model inputs
- Add Outputs/ GIS analysis, deploy configs, lit review
- Add proposal document for 湖北省卫生健康科技项目
- Enable full data portability for cross-machine development

Outputs/deploy-backend/.env.example

@@ -0,0 +1,15 @@
+# Database
+POSTGRES_HOST=localhost
+POSTGRES_PORT=5432
+POSTGRES_USER=wuhan_user
+POSTGRES_PASSWORD=CHANGE_ME
+POSTGRES_DB=wuhan_disease
+
+# Auth
+AUTH_SECRET_KEY=CHANGE_ME_TO_RANDOM_STRING
+AUTH_DEFAULT_USER=admin
+AUTH_DEFAULT_PASSWORD=admin123
+AUTH_TOKEN_EXPIRE_MINUTES=480
+
+# CORS (add your frontend domain)
+CORS_ORIGINS=http://localhost,http://YOUR_SERVER_IP