Improved interaction with exposed models

[MatsMoll]

A lot of clean up and improved interactions with exposed models. Such as MLFlow, partitions etc.

@feature_view(source=FileSource.parquet_at("recipes.parquet"))
class Recipes:
    recipe_id = Int32().as_entity()
    name = String()

@model_contract(
    input_features=[ Recipes().name ],
    exposed_model=ollama_extraction(model="mistral:latest")
)
class RecipeMainIngredients:
    recipe_id = Int32().as_entity()
    response = String().as_prompt_completion()
    model_version = String().as_model_version()

    protein = String().description(
        "The main source of protein in the recipe"
    )
    carbohydrate = String().description(
        "The main source of carbohydrates in the recipe"
    )

store = ContractStore.from_contracts([Recipes, RecipeMainIngredients])
df = await store.model(RecipeMainIngredients).predict_over({
    "recipe_id": [1, 2, 3, 4, 5]
}).to_polars()
print(df)