fix: disjoint Transform queries in update_tractor_beam_visual

Add Without<TractorBeamSprite> filter to boss_query so Bevy's parallel
access checker can prove the &Transform read on bosses and the
&mut Transform write on beam-sprite children target disjoint entity
sets. Without it, the system panicked on first run with a B0001
"conflicts with a previous system parameter" error.

src/enemy.rs

@@ -660,7 +660,7 @@ pub fn boss_capture_attack(
 /// Update tractor beam visual: pulse opacity and update beam height.
 pub fn update_tractor_beam_visual(
     time: Res<Time>,
-    boss_query: Query<(Entity, &Transform, &TractorBeam)>,
+    boss_query: Query<(Entity, &Transform, &TractorBeam), Without<TractorBeamSprite>>,
     mut sprite_query: Query<(&mut Sprite, &mut Transform), With<TractorBeamSprite>>,
     children: Query<&Children>,
 ) {