Bug: Removal of mii.pydantic_v1 broke entrypoint scripts

[KMouratidis]

When trying to run either of the entrypoint scripts, the following line in the mii/entrypoints/data_models.py file causes an import error:

from mii.pydantic_v1 import BaseModel, BaseSettings, Field

Restoring the file fixes the issue, but I guess that's not a solution. Another option is to:

1. Install pydantic-settings and change that line to:

from pydantic import BaseModel, Field, ConfigDict
from pydantic_settings import BaseSettings

2. Since pydantic now has the model_ namespace protected, about 10 classes need to have model_config = ConfigDict(protected_namespaces=()) (or similar) added to them, namely the ChatCompletion*, TokenCheckRequestItem, Embeddings*,Completion*, and AppSettings.
3. AppSettings.model_id needs to marked as Optional[str] since it is not passed on initialization (see here and here)

I only tested with the openai_api_server.py script.

[KMouratidis]

Restoring the file does not work because pydantic.v1.BaseModel causes the server to throw 422 errors. I guess the only option is to update the file 😕