Guild Chest Fix 1.3.0

Stress tested release. Over one thousand deliberately corrupted and mutated save files were thrown at the tool. Every single one was either handled losslessly or refused with a short clear message, no crashes, no hangs, no writes. A slice of that fuzzing now runs on every build. The save header is now verified to read back byte for byte before the tool continues, and headers from future game versions get a clear message instead of a confusing one. Corrupt files that declare impossible sizes are refused up front. New in this version, the tool can also copy Palworld worlds out of the Game Pass save store, press G in the menu or run with --gamepass. That copy can then be fixed and used on a Steam install or a dedicated server. The tool never writes into the Xbox store itself since that is not safe.