feat: initial BCP roster scouting tool

Paste a Best Coast Pairings event link to get roster-only stats:
faction/disposition distribution, per-team ITC rank rollups, and an
optional list-backfill for players missing faction/disposition data
(uses the viewer's own BCP auth token, stored client-side only).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

scouting.gateway-gamers.net.conf

@@ -0,0 +1,36 @@
+server {
+    listen 80;
+    listen [::]:80;
+    server_name scouting.gateway-gamers.net;
+    return 301 https://$host$request_uri;
+}
+
+server {
+    listen 443 ssl;
+    listen [::]:443 ssl;
+    server_name scouting.gateway-gamers.net;
+
+    root /var/www/domains/gateway-gamers.net/scouting;
+    index index.html;
+
+    # SSL — managed by Certbot
+    # ssl_certificate /etc/letsencrypt/live/scouting.gateway-gamers.net/fullchain.pem;
+    # ssl_certificate_key /etc/letsencrypt/live/scouting.gateway-gamers.net/privkey.pem;
+    # include /etc/letsencrypt/options-ssl-nginx.conf;
+    # ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem;
+
+    # Hide nginx version
+    server_tokens off;
+
+    # Security headers
+    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
+    add_header X-Content-Type-Options "nosniff" always;
+    add_header X-Frame-Options "SAMEORIGIN" always;
+    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
+    add_header Permissions-Policy "geolocation=(), microphone=(), camera=()" always;
+    add_header Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self'; connect-src 'self' https://newprod-api.bestcoastpairings.com; img-src 'self' data:;" always;
+
+    location / {
+        try_files $uri $uri/ =404;
+    }
+}