Tests parameterize models directly with dicts, not pydantic models, which are reserved for API calls

Merged in usage of session module global object instead of singleton class; still working through tests

Resolved Session re-initialization issue: Singleton.__call__() recognizes existing instances relative to namespace (model_server.base.session vs. base.session)

This reverts merge request !16

Added superclass for semantic segmentation models and modified ilastik pixel classification to inherit from it

Delegated export of patch products to ZMaskObjectTable class; consolidated both batch runner and API-facing workflows into infer_object_map_from_zstack(); consolidated parameterization of export products into pydantic model

Validated non-duplication when loading ilastik model with same project file name, irrespective of path formatting

Validated non-duplication when loading ilastik model with same project file name, irrespective of path formatting

Made the one implemented ilastik object classification model accomodate only the ilastik workflow that requires pixel prediction maps

Implemented workflow and endpoint for two-stage (px -> ob) classification in ilastik; tests pass and image data is correct