v0.9.0 - First public test
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- Public release of the MZ3000, MZ6000, MZ9900, and MZ9000 vehicle set.
- Includes free small/T2 stackers and ore sorters, 3x stock truck and tree
  planter cargo, 5x tree harvester work speed, and 2x small diesel power.
- Stock excavator capacity and performance remain unchanged.
- Custom machines use Mine Control Tower jobs and native multi-truck unloading.
- MZ3000 cargo now appears visibly in the dump bed when loaded.
- Known limitation: the custom vehicle art is chunky, simplified, and closer
  to Tonka-toy styling than the detailed stock game models.
- Known limitation: public beta may still contain animation, docking,
  pathfinding, or terrain edge cases.

