feat: add metering data

src/web/iod.ts

@@ -91,7 +91,13 @@ export async function localIodSearch(
     )
   ).flat()
 
-  return results
+  // results 根据 doId 去重
+    const map = new Map<string, IodRegistryEntry>()
+    for (const r of results) {
+        map.set(r.doId, r)
+    }
+
+  return Array.from(map.values())
 }
 
 const ARXIV_URL_PATTERN = /^https?:\/\/arxiv\.org\//