Three Dash Structure Optimizer

Changes in v1.1.3

• Entity Tracking Distance Fast-Path: Replaced heavy vector allocations and passenger tree traversal with a lightweight Chebyshev coordinate pre-check for players outside tracking distance.
• Stationary SectionPos Reuse: Reuses section coordinates when entities remain inside their chunk section, eliminating per-tick SectionPos allocations for 95%+ of entities.
• Brain AI Task Buffer Pooling: Replaced per-tick heap allocation of running behavior lists with zero-allocation ring buffers for mobs with Brain AI (Villagers, Piglins, Warden).
• Drop Item Unstuck Collision Optimization: Replaced full chunk section entity scans for dropped items and XP orbs with typed checks against only collidable entity classes (AbstractBoat, Shulker, HappyGhast).
• Memory & Stability Hardening: Immediate cleanup of pooled thread buffers to prevent leaks, connection guards for fake players, and dynamic render distance scaling support.