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>

astro.config.mjs

@@ -0,0 +1,15 @@
+import { defineConfig } from "astro/config";
+import sitemap from "@astrojs/sitemap";
+
+const site = process.env.PUBLIC_SITE_URL ?? "https://www.bluecapstrategies.com";
+
+export default defineConfig({
+  site,
+  output: "static",
+  trailingSlash: "always",
+  integrations: [
+    sitemap({
+      filter: (page) => !page.includes("/thank-you/"),
+    }),
+  ],
+});