Add getIndexStats function to db-operations

This function is required by the GitHub Actions workflow for
gathering database statistics after the build completes.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

lib/db-operations.js

@@ -223,6 +223,15 @@ function getStats() {
   };
 }
 
+function getIndexStats() {
+  const db = getDb();
+  return {
+    totalLists: db.prepare('SELECT COUNT(*) as count FROM awesome_lists').get().count,
+    totalRepositories: db.prepare('SELECT COUNT(*) as count FROM repositories').get().count,
+    totalReadmes: db.prepare('SELECT COUNT(*) as count FROM readmes').get().count
+  };
+}
+
 // Random
 function getRandomRepository() {
   const db = getDb();
@@ -256,5 +265,6 @@ module.exports = {
   getSetting,
   setSetting,
   getStats,
+  getIndexStats,
   getRandomRepository
 };