Add flag include_raw_msg_body

[troman29]

Hi! We really miss this flag. I added it, but unfortunately I can't check it due to an error in the web container.

2023-11-08 15:15:40   File "/usr/src/ton-indexer/api/api_v1/main.py", line 11, in <module>
2023-11-08 15:15:40     from . import schemas
2023-11-08 15:15:40   File "/usr/src/ton-indexer/api/api_v1/schemas.py", line 35, in <module>
2023-11-08 15:15:40     class MsgAddressInt(BaseModel):
2023-11-08 15:15:40   File "pydantic/main.py", line 197, in pydantic.main.ModelMetaclass.__new__
2023-11-08 15:15:40   File "pydantic/fields.py", line 506, in pydantic.fields.ModelField.infer
2023-11-08 15:15:40   File "pydantic/fields.py", line 436, in pydantic.fields.ModelField.__init__
2023-11-08 15:15:40   File "pydantic/fields.py", line 552, in pydantic.fields.ModelField.prepare
2023-11-08 15:15:40   File "pydantic/fields.py", line 668, in pydantic.fields.ModelField._type_analysis
2023-11-08 15:15:40   File "/usr/lib/python3.8/typing.py", line 774, in __subclasscheck__
2023-11-08 15:15:40     return issubclass(cls, self.__origin__)
2023-11-08 15:15:40 TypeError: issubclass() arg 1 must be a class

It doesn't seem to be related to my changes. Please merge this so that we can switch to this API from the ton-http-api, which is currently not working correctly.