[BUG] Can't pass file to Unstructured file loader for upsertion

[kennyakers]

Describe the bug
When trying to upsert a document via the Unstructured File Loader via the Flowise API, the file attached in the POST call is ignored, and the file specified in the node in the UI is uploaded instead. This was previously fixed for the PDF loader (thank you!), but is still present for Unstructured File Loader.

In this call, a PDF of a short story (several pages long) is attached. As you can see in the response, the file that was upserted was the file "blank.pdf", which is a single page with the words "ERROR" on it that was uploaded directly into the Unstructured File Loader node:

Expected Behavior
The attached file (above: Girl Jamaica Kincaid.pdf) should replace the file in the node (above: blank.pdf) and be upserted.

Flow & Config
Below is an example flow and override configuration to recreate this behavior:

Setup

• Installation: RepoCloud instance
• Flowise v2.2.2