ChainDecor

• Fixed old chain displays and interaction hitboxes not being removed.
• Added cleanup for entities from unloaded and reloaded chunks.
• Fixed external teleports continuing zipline movement.
• Fixed early dismounts and getting stuck at the end of long ziplines.
• Added zipline ride recovery after reconnecting.
• Restored smooth zipline starting behavior.
• Preserved all decorations, visuals and existing data.

Requires Java 25.
For Paper/Purpur 26.1–26.2.