There's a number of issues here, so I'll try to answer that question for each case.
I wouldn't use Audacity for "merely" converting the file type. I'd use a format converter such as LameDropXP or Foobar2000 (both free applications).
This avoids the unnecessary intermediate conversions from WAV -> Audacity Project (32-bit float format data) -> MP3.
I wouldn't use such extreme length file names. If I need to store information about a file, I'd use metadata (which is what metadata tags are designed for).
Using very long descriptive names poses potential risks of using invalid characters (see: https://docs.microsoft.com/en-us/window ... ing-a-file) or breaking compatibility with other applications that may have additional limitations.
Very long file names are also risky if you ever use devices (such as thumb drives) that often have a maximum length for the full "file path + file name" of around 255 characters.
As I wrote previously, I would name the project.
In Audacity 2.3.0 and later, it is possible to name the project without saving the project. The easiest way to do this is:
1) Enable "View menu > Extra menus"
2) "Extra menu > Scriptables 1 > Set Project"
3) In the "Set Project" dialog, tick the check box before the "Name" field, and enter the required project name, then click "OK" (see also: https://manual.audacityteam.org/man/ext ... et_project)
Audacity is open source, created and supported by volunteers. Patches are welcome, but I doubt it is as simple as you suggest.