Escalation 0.17.2

• Fixed mobs "dancing" in place and whiffing melee. They now close in, hit, and back off cleanly (zombies, warbrain units, cavalry).
• Fixed shield skeletons. They now draw their axe up close, block your swings and arrows with the shield, then trade in melee.
• Mobs now have their decision brain from day one. They fight and coordinate smart from a fresh world, while still spawning weak and bare-handed.
• Abilities now scale properly with threat level. Faster shooting and running, special moves (pounce, charge, sprint), enhanced senses and swarm tactics all ramp up later instead of hitting you on night one.
• Reduced early-game spawns. No director assaults on a fresh world, and the first nights are back to roughly vanilla density.