二手贩子的卡按卖家调整健康度：成色问题项数 0.5 / 1.5 / 2.5

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

src/Decentralized.Domain/Tuning.cs

@@ -88,6 +88,10 @@ namespace Decentralized.Domain
         public const int UsedFirstDay = 3;
         /// <summary>显卡价值 = 型号定价 ×（下限 + (1 − 下限) × 健康度）。</summary>
         public const double CardValueFloor = 0.25;
+        /// <summary>黑市、鉴定等处二手卡的健康度范围（均匀取）。</summary>
+        public const double CardHealthMin = 25, CardHealthMax = 85;
+        /// <summary>二手贩子带来的卡的健康度范围，按老实人、中间商、骗子：越不老实卡越旧，平均每张卡约 0.5 / 1.5 / 2.5 项成色问题（叶片、金手指、挡板、封条）。</summary>
+        public static readonly double[] UsedHealthMin = { 72, 55, 42 }, UsedHealthMax = { 97, 85, 72 };
         /// <summary>外观折价（占价值的比例）：叶片积灰 / 缺角，金手指发暗 / 氧化，挡板划痕，封条缺失。</summary>
         public const double CardFanDust = 0.04, CardFanChipped = 0.12, CardFingersDark = 0.04, CardFingersOxidized = 0.12, CardBracketScratch = 0.02, CardSealMissing = 0.06;
         /// <summary>非主交易对每晚被拉回参考价的比例，及其深度占主交易对的比例。</summary>