Hey, so our notebooks reading a bunch of json files from storage typically use a input_file_name() when moving from raw to bronze, but after upgrading to Unity Catalog we get an error message:

AnalysisException: [UC_COMMAND_NOT_SUPPORTED] input_file_name is not supported in Unity Catalog.;

Why is this? Are we following a bad practice by wanting to have filenames for tracing data through the different storage layers? Does Unity Catalog perhaps do this automatically in some way? Just barely started testing Unity Catalog, so struggling a bit to grasp what the differences are. I thought it was merely a tool that did some stuff automatically (lineage etc) and gave us a simple metastore to interact with.