Investigate more `canonicalize`/`get_path` fallbacks

[seritools]

Seen in #32 (comment)

Interesting links:

• Eclipse-Community@a7d5b8c#diff-6c2468603d973cb2b153e900ed9e0865db29c65683c2da1e80aafbbaaa5bbcfeR842
• https://stackoverflow.com/questions/65170/how-to-get-name-associated-with-open-handle
• https://learn.microsoft.com/en-us/windows/win32/memory/obtaining-a-file-name-from-a-file-handle