feat: req preprocessor

shared/plugin/implementation/requestPreProcessor/reqpreprocessor_test.go

@@ -107,7 +107,10 @@ func TestNewUUIDSetter(t *testing.T) {
 			// Define a dummy handler
 			dummyHandler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 				w.WriteHeader(http.StatusOK)
-				io.Copy(w, r.Body)
+				if _, err := io.Copy(w, r.Body); err != nil {
+					http.Error(w, "Failed to copy request body", http.StatusInternalServerError)
+					return
+				}
 			})
 
 			// Apply middleware