Stacking System
- Fixed stackable items (ores, ingots, gems, etc.) not stacking properly in inventory
- Fixed items losing their tracking IDs when stacking together
- Fixed metadata comparison preventing legitimate items from combining

Detection System - Reduced False Positives
- Fixed DUPLICATE_ID false positives when mining from the same vein
- Fixed velocity checks incorrectly flagging normal mining activity
- Fixed grace period not working for new players joining the server
- Fixed detection confidence score calculation errors
- Fixed behavioral checks being too aggressive on legitimate gameplay

Mining & Item Drops
- Fixed duplicate ID generation when mining ore veins
- Fixed transaction logging creating duplicate records

Death Tracking
- Fixed death tracking only storing one ID per item type
- Fixed item recovery validation not working with stacked items

Improvements
- Increased detection thresholds to reduce false positives (90% confidence required)
- Improved grace period handling for new players
- Better stack ID management for all stackable items
- Enhanced vein tracking while maintaining unique item IDs
- More accurate velocity and behavior analysis

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