fixup! feat(jsonrpc): add support for JSON-RPC 2.0 batch requests

Author: renatomaia

internal/jsonrpc/jsonrpc.go

@@ -242,6 +242,8 @@ func (s *Service) handleRequest(w io.Writer, r *http.Request, req RPCRequest) er
 
 	var rpcErr *RPCError
 	if errors.As(err, &rpcErr) {
+		// RPC errors describe expected client-facing failures. Do not log them at
+		// error level; unexpected failures are logged below before being hidden.
 		return writeRPCError(w, req.ID, rpcErr.Code, rpcErr.Message)
 	}
 
@@ -344,8 +346,8 @@ func (s *Service) handleRPC(w http.ResponseWriter, r *http.Request) {
 		s.dispatchOneRequest(w, r, req, budgetResp)
 
 	case '[':
-		// Keep each batch element raw so malformed requests can fail independently
-		// without preventing valid requests in the same batch from being handled.
+		// Keep each batch element raw so malformed requests fail independently and
+		// the list-item limit can be checked before dispatching any request.
 		var reqSeq []json.RawMessage
 		if err := json.Unmarshal(body, &reqSeq); err != nil {
 			s.writeRPCError(w, nil, JSONRPC_PARSE_ERROR, "invalid request batch")