Use pybind11_protobuf when passing Fingerprints.

PiperOrigin-RevId: 556081074

Author: BlaziusMaximus

pybind11_protobuf/proto_caster_impl.h

@@ -40,6 +40,7 @@ struct proto_caster_load_impl {
 
   // load converts from Python -> C++
   bool load(pybind11::handle src, bool convert) {
+    LOG(ERROR) << "load: " << src;
     // When given a none, treat it as a nullptr.
     if (src.is_none()) {
       value = nullptr;