Move black market random-detail constants into Tuning

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

src/Decentralized.Domain/Tuning.cs

@@ -98,6 +98,12 @@ namespace Decentralized.Domain
         /// 订单被截获时变成受控交付的概率；每晚某个近期卖家落网的概率。</summary>
         public const double BmHoneypotBase = 0.01, BmHoneypotPerSecRep = 0.0004, BmHoneypotMax = 0.06, BmControlled = 0.35, BmSellerBust = 0.008;
         public const int BmHoneypotDays = 6, BmTrapDelay = 4;
+        /// <summary>商家货架的随机细节：现货每种的库存上限、每件价格的随机抖动（±）、全新矿卡的库存比常规少多少；尖端店铺里卖显卡的概率与显卡档次下限；
+        /// 个人卖家里卖显卡的概率与其中全新的比例；骗子 / 诚实卖家是新号（成交少、好评随意）的概率；新号与老号的成交数、好评范围；论坛点名骗子的概率；
+        /// 托管资金推高跑路概率超过基础的几倍时论坛出现"提币变慢"。</summary>
+        public const int BmSpotQtyMax = 3, BmNewGpuQtyMinCut = 1, BmNewGpuQtyMaxCut = 2, BmEliteGpuTier = 3;
+        public const double BmPriceJitter = 0.03, BmEliteGpuChance = 0.4, BmPersonalGpuChance = 0.15, BmPersonalGpuNew = 0.3, BmScamFresh = 0.6, BmHonestFresh = 0.25, BmForumScamHint = 0.5, BmForumRugFactor = 3;
+        public const int BmFreshTradesMax = 12, BmOldTradesMin = 25, BmOldTradesMax = 220, BmScamOldRatingMin = 94, BmScamOldRatingMax = 99, BmFreshRatingMin = 70, BmFreshRatingMax = 100, BmOldRatingMin = 90, BmOldRatingMax = 99;
         /// <summary>追查记罪证：记入的比例（货款 × 比例）、同一次蜜罐（或一次落网）累计最多记多少。</summary>
         public const double BmTrapShare = 0.4, BmTrapWindowCap = 400;
         /// <summary>货架上除违禁品外的两类货：高科技物品（需中档声望）和显卡的出现概率、加价（在现货溢价 / 订单价之外再加），显卡里夹假卡的比例、是全新卡（成色 100、封条完好、不会是假卡）的概率。</summary>