Rig: game module bay with damped, capped effects

The rig gets the game's universal module bay (module adjacency included).
The machine's summed performance, efficiency and quality percentages are
divided by 4, like the ratios vanilla machines use, and capped: hashrate
at most +20%, power saving at most 25%, card wear at most -30%. Performance
also raises wear and burn-out chance by the same amount; negative
efficiency (overclock module, neural cores) raises power draw. Replaces the
planned mod-specific overclock module. Tested in game.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/Decentralized.Domain/Tuning.cs

@@ -16,7 +16,8 @@ namespace Decentralized.Domain
         public const double NpcAdj = 0.05;
         public const double PoolFee = 0.03;
         public const int RigPrice = 400, RigKj = 2, RigSlots = 4;
-        public const double OcHash = 1.25, OcKj = 1.40, OcWear = 1.3, OcDeath = 1.2;
+        /// <summary>矿架上模块百分比的折算系数（原版机器用 2–4），以及各项上限。</summary>
+        public const double ModuleRatio = 4, ModuleHashCap = 0.20, ModuleKjCap = 0.25, ModuleWearCap = 0.30;
         public const double DeathBase = 0.001, DeathWorn = 0.03, FakeDeathFactor = 2;
         public const double RefurbishHealth = 30;