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This PR improves the safety and reliability of the deleteOldFiles()
function by:
Preventing symlink attacks
Uses std::filesystem::canonical() to resolve all paths, eliminating ./..
and symlinks
Verifies each file is actually inside the target directory before
deletion
Safer file operations
Explicitly skips non-regular files (directories/symlinks)
---------
Co-authored-by: Nik <werwolv98@gmail.com>
