Teleportation Engine Rewritten
Our teleportation system is now faster, smarter, and safer for memory:

• ⏳ Cancels cleanly when moving, dying, or disconnecting.
• Validates duel sessions before teleport completes.
• ❌ Only unloads target chunks on cancel if arena uses ON_DEMAND.

New Default: HYBRID Chunk Load Method
Introducing the HYBRID method — now the default for all new arenas!

• Loads arena chunks on-demand (like ON_DEMAND)
• Keeps them alive for 30 minutes after last duel
• Cleans up unused regions automatically every 60s

Recommended for performance + readiness on medium/large servers
Other Fixes & Internal Improvements

• Teleport countdown no longer bugs out from command spam
• No memory leaks from abandoned Bukkit tasks
• Smarter arena chunk retention via ChunkLoadingManager