feat(ingest): readability wrapper

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

lib/ingest/readability.js

@@ -0,0 +1,16 @@
+import { JSDOM } from 'jsdom';
+import { Readability } from '@mozilla/readability';
+
+export function extract(html, url) {
+  const dom = new JSDOM(html, { url });
+  const reader = new Readability(dom.window.document);
+  const a = reader.parse();
+  if (!a) return { title: null, textContent: '', excerpt: null, byline: null, siteName: null };
+  return {
+    title: a.title || null,
+    textContent: (a.textContent || '').trim(),
+    excerpt: a.excerpt || null,
+    byline: a.byline || null,
+    siteName: a.siteName || null
+  };
+}