Draft optimizer workflow.

tools/optimizer/metrics/scripts/open_issues.js

@@ -0,0 +1,14 @@
+import { execSync } from 'node:child_process';
+
+try {
+  const output = execSync('gh issue list --state open --limit 1000 --json number', { encoding: 'utf-8' });
+  const issues = JSON.parse(output);
+  process.stdout.write(JSON.stringify({
+    metric: 'open_issues',
+    value: issues.length,
+    timestamp: new Date().toISOString()
+  }));
+} catch (err) {
+  process.stderr.write(err.message);
+  process.exit(1);
+}