Drop generated cards; registry descriptions become Elements tooltips

- resolveRefs no longer adds cards to a diagram; it returns node id →
  description, which the page sets as the tooltip of the matching row in
  Archify's Elements panel
- hand-written cards pass through unchanged; docs and changelog

src/views/diagramView.ts

@@ -199,10 +199,11 @@ class DiagramPreview implements vscode.Disposable {
       notice: result.evidenceNotice ? { kind: 'warning', text: result.evidenceNotice } : undefined,
       viewer3d: viewer3dOption(this.panel.webview, this.context.extensionUri),
       links: Object.fromEntries(prepared.links),
+      descriptions: Object.fromEntries(prepared.descriptions),
       model,
     });
     // Nonces differ per render, so compare the renderer output instead.
-    const fingerprint = `${viewerTheme()}\u0000${result.evidenceNotice ?? ''}\u0000${JSON.stringify([model ?? null, [...prepared.links]])}\u0000${result.html}`;
+    const fingerprint = `${viewerTheme()}\u0000${result.evidenceNotice ?? ''}\u0000${JSON.stringify([model ?? null, [...prepared.links], [...prepared.descriptions]])}\u0000${result.html}`;
     if (!force && this.rendered && fingerprint === this.lastHtml) {
       void this.panel.webview.postMessage({ type: 'notice', notice: undefined });
       return;