fix(seo): canonical self-deindexing on /docs/*, truthful llms.txt, real sitemap dates, RSS feed, breadcrumbs, per-article OG images

- /docs subpages canonicalized to /docs and had no descriptions; each now
  uses pageMetadata with its own path (was: Google could index at most one)
- llms.txt claimed Team EUR 149, RBAC/SLA and BYO-cloud that do not exist;
  regenerated from lib/seo.ts truth + new llms-full.txt with docs content
- sitemap stamped lastModified=now on every request; now real per-route dates
  from new lib/articles.ts registry (single source for guides index/sitemap/RSS)
- new /feed.xml RSS 2.0 route + alternates link in root layout
- articleJsonLd: image (per-guide opengraph-image via lib/og-article.tsx),
  Person author, wordCount; new breadcrumbJsonLd on guides + docs
- GSC verification via NEXT_PUBLIC_GSC_VERIFICATION (documented in .env.example)
- dropped fabricated Enterprise EUR 499 offer from SoftwareApplication JSON-LD
- article-shell: OL/Table/Note primitives for upcoming articles

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SXUwmPVRTD8AKQtio6gCN5

apps/web/app/(marketing)/guides/article-shell.tsx

@@ -71,3 +71,33 @@ export function UL({ children }: { children: ReactNode }) {
 export function Strong({ children }: { children: ReactNode }) {
   return <strong className="font-semibold text-[--color-fg]">{children}</strong>;
 }
+
+export function OL({ children }: { children: ReactNode }) {
+  return (
+    <ol className="mt-3 list-decimal space-y-1.5 pl-5 text-[14.5px] leading-relaxed text-[--color-fg-muted]">
+      {children}
+    </ol>
+  );
+}
+
+/** Comparison / feature tables. Pass fully-formed <thead>/<tbody> children;
+ *  the wrapper provides the horizontal-scroll container so wide tables never
+ *  break the mobile viewport. */
+export function Table({ children }: { children: ReactNode }) {
+  return (
+    <div className="mt-4 overflow-x-auto rounded-lg border border-[--color-border]">
+      <table className="w-full min-w-[560px] border-collapse text-left text-[13.5px] leading-relaxed [&_td]:border-t [&_td]:border-[--color-border] [&_td]:px-3.5 [&_td]:py-2.5 [&_td]:align-top [&_td]:text-[--color-fg-muted] [&_th]:bg-[--color-bg-subtle] [&_th]:px-3.5 [&_th]:py-2.5 [&_th]:text-[12px] [&_th]:font-semibold [&_th]:uppercase [&_th]:tracking-wider [&_th]:text-[--color-fg]">
+        {children}
+      </table>
+    </div>
+  );
+}
+
+/** Callout for caveats and version-sensitive facts. */
+export function Note({ children }: { children: ReactNode }) {
+  return (
+    <div className="mt-4 rounded-lg border border-[--color-border] bg-[--color-bg-subtle] px-4 py-3 text-[13.5px] leading-relaxed text-[--color-fg-muted]">
+      {children}
+    </div>
+  );
+}