Chunk Save Fix: Modern Port

Chunk Save Fix: Modern Port is an unofficial modern port of the original Chunk Save Fix by askaban23. It fixes MC-224729, an issue where partially generated chunks are not saved in certain situations, which can lead to broken terrain features at chunk borders.

This mod helps ensure chunks are saved more reliably when they are kept loaded by tickets but have not yet reached full border accessibility.

Features:

• Fixes partially generated chunks not being saved correctly
• Helps prevent broken terrain generation at chunk borders

For example, this can help with chunks kept alive by spawn tickets, player tickets, or worldgen-related tickets that might otherwise be skipped during saves.