ChunkFreezer

Fixed 1. Mob buckets (fish, axolotl, etc.) no longer release a mob into a frozen chunk on 1.21.11 / 26.x. Root cause: since 1.21.9 buckets are used through a different server code path where Paper pre-cancels the interact event, so the plugin never saw the bucket use at all. 2. Players can no longer fall asleep in, wake up inside, or respawn inside a frozen chunk. 3. Buckets used across a chunk border can no longer place a mob inside the frozen chunk. 4. Fixed NPEs in the bucket handling and in the public API - the protection no longer crashes. New 1. Safety net: any entity that shows up in a frozen chunk after it froze gets removed - even if Minecraft changes the spawn mechanics again. 2. /chunk list and the public API no longer report chunks as frozen that were never frozen. 3. Typos in config.yml (unknown entity or material names) are now reported in the console instead of being silently ignored. Compatibility 1. Paper 1.21.4+ and Folia 1.21.4+ (tested on 1.21.4, 1.21.11, 26.1.2 and 26.3). No config changes needed - all new options work with existing config files.