Fix oldfiles picker ignoring entries for remote files

[speelbarrow]

Description

Please include a summary of the change and which issue is fixed. Please also
include relevant motivation and context

Fixes #3520, resurrects #3521

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

• Locally, results were the same as those documented in Fix oldfiles picker ignoring entries for remote files #3521.

Configuration:

• Neovim version (nvim --version):

NVIM v0.12.2
Build type: Release
LuaJIT 2.1.1774638290
Run "nvim -V1 -v" for more info

• Operating system and version: macOS 26.5

Checklist:

• My code follows the style guidelines of this project (stylua)
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (lua annotations)