Upload a file and store it in the configured storage backend.
This endpoint provides the simplest method for uploading files up to a service-defined limit (e.g., 100 MB).
API key for authentication
Selected Account ID
Successful Response
Represents a file in the Document Understanding Core. Based on https://docs.google.com/document/d/1nB0SqUGTuIBiNMzLVfLW5NWSEZrcgEaXtzRessQgAPo/edit?tab=t.0#bookmark=id.ne9tup4c49z5
ID of the entity
ID of the project
uploading, uploaded, failed, deleted "file"