fix(Bullets): 调整WhiteSoul子弹速度增长率和添加生命周期

将速度增长率从1.1降低至1.05以平衡游戏难度
为WhiteSoul子弹添加lifeTime属性防止内存泄漏

components/Bullets/WhiteSoul.tscn

@@ -45,6 +45,7 @@ alpha_curve = SubResource("CurveTexture_bd63g")
 texture_filter = 1
 script = ExtResource("2_ld7n7")
 speed = 1.0
+lifeTime = 1000.0
 
 [node name="texture" parent="." index="0"]
 rotation = -1.5708

scripts/Contents/Bullets/WhiteSoul.gd

@@ -3,6 +3,6 @@ extends BulletBase
 func register():
 	speed = 1
 func ai():
-	speed *= 1.1
+	speed *= 1.05
 	damage = speed
 	PresetBulletAI.forward(self, rotation)