AutoLoot-GreyGreed 1.6.7

- Strengthened mailbox alert suppression so multiple and delayed Auction House mail attachments remain baseline-only.
- Added a short item-source cooldown while mail transactions are active so staggered mail item gains do not fire quality alerts after the first attachment.
- Preserved alerts for actual loot sources such as world loot, boss loot, gathering, and confirmed loot history.
- Fixed TOC packaging validation so documentation files are not listed as loadable addon files.
