Block reward 90, ASIC prices follow the new card price scale

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

src/Decentralized.Domain/Tuning.cs

@@ -7,7 +7,7 @@ namespace Decentralized.Domain
     {
         // 挖矿
         public const double PscStartPrice = 100;
-        public const double BlockReward = 50;
+        public const double BlockReward = 90;
         public const int HalvingDays = 90;
         public const double NpcHash0 = 360;
         public const double NpcKjPerH = 2.4;