Changes to Foundational Time Series Model Multi Series Cross Validation

added the new optional request property series/start_datetime

added the new optional request property feature_contributions_type

the model request property type changed from no type to string

added the new optional request property feature_contributions

added the new optional request property full_history

added the new optional request property model_parameters

added the new optional request property multivariate

added the new optional request property series/X_future

added the new optional request property series/categorical_exog

the request property n_windows became optional

the n_windows request property default value 1 was added

request property series/X/anyOf[subschema #1]/items/items list-of-types was widened by adding types string to media type application/json

added the optional property detail/items/ctx to the response with the 422 status

added the optional property detail/items/input to the response with the 422 status

added the optional property feature_contributions to the response with the 200 status