feat: add seo diagnostics tool with cli commands, config paths, and static versioning

Add SEO_REPORTS_DIR to config, STATIC_VERSION for cache-busting, seo prune/clear CLI subcommands, tools router with seo job endpoints, and boot-versioned static URLs in Dockerfile and Makefile

nginx/nginx.conf.template

@@ -40,10 +40,19 @@ server {
         log_not_found off;
     }
 
+    location ~ ^/static/v\d+/(?<asset>.+)$ {
+        alias /app/static/$asset;
+        add_header X-Content-Type-Options nosniff;
+        expires 1y;
+        add_header Cache-Control "public, immutable, max-age=31536000";
+        access_log off;
+        log_not_found off;
+    }
+
     location /static/ {
         alias /app/static/;
-        expires 7d;
-        add_header Cache-Control "public, immutable, max-age=604800";
+        expires 1h;
+        add_header Cache-Control "public, max-age=3600";
         access_log off;
         log_not_found off;
     }
@@ -61,6 +70,20 @@ server {
         proxy_send_timeout 3600s;
     }
 
+    # SEO Diagnostics live progress websocket (/tools/seo/<uid>/ws).
+    location ~ ^/tools/seo/[^/]+/ws$ {
+        proxy_pass http://app;
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection $connection_upgrade;
+        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;
+        proxy_read_timeout 3600s;
+        proxy_send_timeout 3600s;
+    }
+
     location /avatar/ {
         proxy_pass http://app;
         proxy_set_header Host $host;