Clippy fixes

src/tools/docs/docs.rs

@@ -17,6 +17,12 @@ pub struct DocCache {
     cache: Arc<Mutex<std::collections::HashMap<String, String>>>,
 }
 
+impl Default for DocCache {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl DocCache {
     pub fn new() -> Self {
         Self {

tests/integration_tests.rs

@@ -24,7 +24,7 @@ async fn test_doc_router_initialization() {
 
 #[test]
 fn test_jsonrpc_codec_functionality() {
-    let mut codec = JsonRpcFrameCodec::default();
+    let mut codec = JsonRpcFrameCodec;
     let json_rpc = r#"{"jsonrpc":"2.0","method":"lookup_crate","params":{"crate_name":"tokio"},"id":1}"#;
     
     let mut buffer = tokio_util::bytes::BytesMut::from(json_rpc);