[Compatibility] Support C2ME mod

[diskree]

The C2ME mod is currently not supported and may be unstable with AchieveToDo. AchieveToDo relies on tracking structure generation to determine sizes, but does not support multi-threading yet, leading to potential issues when C2ME is enabled.

STR:

1. Install AchieveToDo and C2ME together
2. Generate or explore new terrain (structures)
3. Observe server crashes or inconsistent structure data

Expected behavior
AchieveToDo should handle structure generation correctly even with C2ME, without crashes or missed data.

Actual behavior
Potential crashes or data corruption due to multithreading conflicts.
Unstable performance when both mods are active.