Database export name should be of type `Pathlib.path`

• open_database expects a Pathlib.path
• self.export.name is a str

Traceback (most recent call last):
  File "/usr/local/bin/worker-generic-training-dataset", line 8, in <module>
    sys.exit(main())
             ^^^^^^
  File "/usr/local/lib/python3.11/site-packages/worker_generic_training_dataset/worker.py", line 442, in main
    ).run()
      ^^^^^
  File "/usr/local/lib/python3.11/site-packages/worker_generic_training_dataset/worker.py", line 371, in run
    self.download_latest_export()
  File "/usr/local/lib/python3.11/site-packages/worker_generic_training_dataset/worker.py", line 124, in download_latest_export
    open_database(self.export.name)
  File "/usr/local/lib/python3.11/site-packages/arkindex_export/__init__.py", line 85, in open_database
    assert path.exists(), f"SQLite database {path} not found"
           ^^^^^^^^^^^
AttributeError: 'str' object has no attribute 'exists'