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-frontend/nginx.conf

@@ -0,0 +1,26 @@
+server {
+    listen 80;
+    server_name _;
+
+    root /var/www/cbpoa;
+    index index.html;
+
+    # SPA fallback
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+
+    # Proxy API requests to backend
+    location /api/ {
+        proxy_pass http://127.0.0.1:8000/api/;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+    }
+
+    # Gzip
+    gzip on;
+    gzip_types text/plain text/css application/json application/javascript text/xml;
+    gzip_min_length 1000;
+}