Handling of files with non-string metadata

[znichollscr]

Describe the bug

If you take a file with metadata that is not a string (instead, say, a float), then it causes the DRS processing to break (specifically the get_file_path function).

Failing Test

• apply get_file_path on a Dataset that has float metadata (e.g. molecular weight of something)

Expected behavior

Should work the same as for a file without the float metadata.

Screenshots

System

• OS: [e.g. Windows, Linux, macOS]
• Python version [e.g. Python 3.11]

Additional context

Broke processing of CEDS VOC data.