Modalities serializer unable to serialize models made from jsons

[mekhlakapoor]

Describe the bug
The metadata-service rig endpoint is broken for older rig JSONS because the serialize_modalities function does not handle when the modality is a dict object (from older models).

To Reproduce
Steps to reproduce the behavior:

1. Go to http://aind-metadata-service-dev/rig/323_EPHYS1_OPTO_20240212
2. Open locally to see error

Expected behavior
Have the serializer be able to handle different types. Create a unit test that replicates the behavior

Screenshots
File "/app/src/aind_metadata_service/response_handler.py", line 160, in map_to_json_response
response = self._map_data_response(validate=validate)
File "/app/src/aind_metadata_service/response_handler.py", line 104, in _map_data_response
json.loads(aind_model.model_dump_json())
File "/usr/local/lib/python3.10/site-packages/pydantic/main.py", line 415, in model_dump_json
return self.pydantic_serializer.to_json(
pydantic_core._pydantic_core.PydanticSerializationError: Error serializing to JSON: PydanticSerializationError: Error calling function serialize_modalities: AttributeError: 'dict' object has no attribute 'name'

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
Add any other context about the problem here.

[mekhlakapoor]

closed by #1120