Phase 1 B3: enemies die with a corpse window instead of popping out of existence

Server: HealthApplyDamageSystem marks EnemyTag Dying{UntilTick} (TickUtil.
NonZero, ~54 ticks) on the lethal 0-crossing instead of instant destroy,
zeroes every live cue (replicated AttackWindup, LungeState + IsLunging bit,
KnockbackState), destroys on expiry; plain-world tests keep instant destroy
(no NetworkTime) so the suite's assertions stay meaningful.

Every consumer now ignores corpses (all confirmed entity-count/unfiltered by
the design review): EnemyAISystem all 4 passes, BossAISystem brain + summon
cap, RoomEnemyDirector room-clear + MaxAlive fit, WaveSystem cap + cleared,
CyclePhaseSystem breach wipe + DefendCleared, ThreatDirector timeout cull,
TurretFire targeting, CoreDamage drain, ProjectileDamage snapshot (corpses
are not shields), AbilityFire auto-aim candidates, debug cull + telemetry.
Wipe passes skip Dying to avoid cross-ECB double-destroys.

Client: EnemyAnimationDriveSystem finally drives the controller's IsDead
param (Health.Current<=0 is the replicated death read; corpse locomotion
zeroed); CombatFeedbackSystem moves the kill CRUNCH to the 0-crossing (the
prune-edge timing would land it ~1 s late) - the prune keeps a small
dissolve puff for corpses and the legacy full read for alive-vanish culls.

456/456 EditMode.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Assets/_Project/Scripts/Server/Combat/RoomEnemyDirectorSystem.cs

@@ -45,7 +45,7 @@ namespace ProjectM.Server
             state.RequireForUpdate<RunInfo>();
             state.RequireForUpdate<RunRuntime>();
             state.RequireForUpdate<ZoneEnemyDirector>();
-            m_ZoneEnemies = state.GetEntityQuery(ComponentType.ReadOnly<ZoneEnemyTag>());
+            m_ZoneEnemies = state.GetEntityQuery(ComponentType.ReadOnly<ZoneEnemyTag>(), ComponentType.Exclude<Dying>()); // room clear + MaxAlive fit count LIVING only (B3) - corpses neither hold the room open nor crowd out spawns
         }
 
         [BurstCompile]