add event clustering feature to group articles by similarity and time proximity

src/routes/events.js

@@ -0,0 +1,37 @@
+const db = require('../db');
+
+async function eventRoutes(fastify) {
+  fastify.get('/events', async (request, reply) => {
+    const query = request.query || {};
+
+    if (!query.id) {
+      reply.code(400);
+      return { error: 'id is required' };
+    }
+
+    const id = Number.parseInt(query.id, 10);
+    if (!Number.isFinite(id)) {
+      reply.code(400);
+      return { error: 'id must be a number' };
+    }
+
+    const event = db.prepare(`SELECT id, title, created_at FROM events WHERE id = ?`).get(id);
+    if (!event) {
+      reply.code(404);
+      return { error: 'Event not found' };
+    }
+
+    const articles = db.prepare(`
+      SELECT id, title, description, content, url, normalized_title, source, pub_date, ingested_at
+      FROM articles
+      WHERE event_id = ?
+        AND content IS NOT NULL AND content != ''
+        AND is_index_page = 0
+      ORDER BY pub_date_effective DESC, id DESC
+    `).all(id);
+
+    return { ...event, articles };
+  });
+}
+
+module.exports = eventRoutes;