6.1 (Soul finding 6): Commit builds a local CultMath.Random from (Zone.CombatSeed,
shot.ShotId) instead of reading and writing the shared ItemManager.Random stream.
Zone exposes CombatSeed (the same expression that already seeds its own _random),
so a shot's outcome is a pure function of zone identity and shot id -- immune to
whatever else drew from the shared stream in between.
6.2 (Soul finding 5): airburst is wired into the simulation instead of back into
Projectile.cs. PendingShot gains BurstPosition/BurstRadius, frozen at Fire time
from PredictedIntercept and the weapon's authored WeaponItemData.AirburstRange
when WeaponModifiers carries Airburst. FireControl.Step resolves such a shot via
Splash instead of Apply, never both. Projectile.cs/ProjectileManager.cs drop the
dead AirburstDistance/AirburstRange fields and write-back.
Tests: FireControlCut6Tests.cs pins both rules (208 baseline + 5 new, all green).
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
