infrastructure-pydantic-migration-pydanticdeprecatedsince20-warning-in-ci-logs-suppo-52f47b68

THEN Replace the deprecated `class Config` in Pydantic models with `model_config = ConfigDict(...)`. This change follows the Pydantic V2 migration guide and prevents deprecation warnings that may escalate to errors in V3.

# Instead of:
class MyModel(BaseModel):
    class Config:
        arbitrary_types_allowed = True

# Use:
from pydantic import ConfigDict

class MyModel(BaseModel):
    model_config = ConfigDict(arbitrary_types_allowed=True)