unstructured

b27ad9b6 - fix: raises on file-like object with .name not a valid path (#2614)

fix: raises on file-like object with .name not a valid path (#2614) **Summary** Fixes: #2308 **Additional context** Through a somewhat deep call-chain, partitioning a file-like object (e.g. io.BytesIO) having its `.name` attribute set to a path not pointing to an actual file on the local filesystem would raise `FileNotFoundError` when the last-modified date was being computed for the document. This scenario is a legitimate partitioning call, where `file.name` is used downstream to describe the source of, for example, a bytes payload downloaded from the network. **Fix** - explicitly check for the existence of a file at the given path before accessing it to get its modified date. Return `None` (already a legitimate return value) when no such file exists. - Generally clean up the implementations. - Add unit tests that exercise all cases. --------- Co-authored-by: John <43506685+Coniferish@users.noreply.github.com>