Initial commit: BlueCap Strategies Astro site

Static Astro 5 site for BlueCap Strategies with exact live-site content
parity, deployed to k3s via GitOps (ArgoCD).

- Page copy in Markdown content collections (services, focus-areas, pages,
  insights) with a Zod SEO schema enforced at build time
- Homepage + About restored to exact live copy; real live-site imagery
- Build-time SEO linter (scripts/seo-lint.mjs) and Playwright e2e suite
- Multi-stage Dockerfile (nginx serves dist/) and Kustomize manifests (k8s/)
- Per-agent robots.txt; config-driven PostHog + Umami analytics scaffold
- ADRs and engineering docs under docs/

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

deploy/nginx.conf

@@ -0,0 +1,26 @@
+server {
+  listen 80;
+  server_name _;
+  root /usr/share/nginx/html;
+  index index.html;
+
+  add_header X-Content-Type-Options "nosniff" always;
+  add_header Referrer-Policy "strict-origin-when-cross-origin" always;
+  add_header Cache-Control "public, max-age=300";
+
+  location = /healthz {
+    access_log off;
+    try_files /healthz =200;
+  }
+
+  location / {
+    try_files $uri $uri/ /404/index.html;
+  }
+
+  error_page 404 /404/index.html;
+
+  location ~* \.(?:css|js|jpg|jpeg|png|webp|svg|ico|woff2)$ {
+    try_files $uri =404;
+    add_header Cache-Control "public, max-age=31536000, immutable";
+  }
+}