filename returns temporary file with front matter processing

[Zash]

Describe the bug When operating on front matter, the filename operator unexpectedly returns what appears to be the name of a temporary file e.g. /tmp/temp1090143499 instead of the name of the file being operated on, e.g. document.md

Version of yq: 4.44.2 Operating system: Debian 12 Linux Installed via: binary download from Github

Input Yaml Concise yaml document(s) (as simple as possible to show the bug, please keep it to 10 lines or less) hello.md:

---
title: Hello
---

# Hello

Lorem ipsum

Command The command you ran:

yq --front-matter extract 'filename' hello.md

Actual behavior

/tmp/temp918014150

Expected behavior

hello.md

[jericson]

I could see a world in which there is another operator (original_filename?) that holds the non-temporary filename. But I don't really see much point in including the temporary filename at all. So it would be ideal if the filename operator just returned what you are actually looking for.