docs: anonymise project asset names in source comments

Measured figures are kept; only the studio-specific level and asset
names are generalised, and the Perforce rationale is reworded to
describe the class of setups rather than this one project.

Co-Authored-By: Claude Code <noreply@anthropic.com>

Source/AssetUsageAuditCore/Private/AssetUsageExporter.cpp

@@ -536,7 +536,7 @@ FAssetUsageExporter::FResult FAssetUsageExporter::CopyExpandedPackages(const TAr
 
         const bool bWasPresent = FileManager.FileExists(*DestinationPath);
 
-        // This repository is Perforce-primary, so the source .uasset is very often read-only on
+        // Perforce-primary repositories keep unopened files read-only, so the source .uasset is very often read-only on
         // disk. Windows CopyFile carries that attribute across, which would make the export folder
         // read-only too - and then an Overwrite-policy re-export fails on its own previous output.
         // Clear the flag on both ends of the problem: before writing over an existing file, and