Refactor runtime bootstrap and ship control flows

apps/backend/Universe/Scenario/SystemGenerationService.cs

@@ -520,6 +520,8 @@ public sealed class SystemGenerationService
     private static float Jitter(int index, int salt, float amplitude) =>
       (Hash01(index, salt) * 2f - 1f) * amplitude;
 
+    // Cheap deterministic pseudo-random helper: same (index, salt) pair always maps to the same 0..1 value.
+    // Generation code uses it instead of a mutable RNG so each procedural choice stays stable for a given seed.
     private static float Hash01(int index, int salt)
     {
         uint value = (uint)(index + 1);