Black market: 18 merchant types from the game's items and player professions

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

src/Decentralized.Domain/Tuning.cs

@@ -106,10 +106,12 @@ namespace Decentralized.Domain
         public const double BmSellDaysFast = 1, BmSellDays1 = 2, BmSellDaysMax = 14;
         public const double BmSaleTaintChanceMin = 0.2, BmSaleTaintChanceMax = 0.9, BmSaleTaintRatioMin = 0.2, BmSaleTaintRatioMax = 0.8;
         public const int BmSaleHold = 3, BmRatingStart = 90, BmRatingFakeLoss = 10, BmMaxListings = 10;
-        /// <summary>商家货架：每周的商家数（从 6 种类型里抽）、每家的货种数、每种货的库存范围；大宗商家出现概率、库存范围、送货天数；
+        /// <summary>商家货架：每周的商家数（其中 2 家从矿卡 / 矿架 / 模组 4 类里抽，其余从其他类型里抽）、每家的货种数、每种货的库存范围；大宗商家出现概率、库存范围、送货天数；
         /// 各类商家的价格系数范围（订单价 = 基础价 × 系数）；批量折扣档（件数、折扣）。</summary>
-        public const int BmMerchantCount = 5, BmMerchantListings = 4, BmQtyMin = 3, BmQtyMax = 6, BmBulkQtyMin = 10, BmBulkQtyMax = 25, BmBulkDays = 6;
+        public const int BmMerchantCount = 7, BmCoreMerchants = 2, BmMerchantListings = 3, BmQtyMin = 2, BmQtyMax = 5, BmBulkQtyMin = 10, BmBulkQtyMax = 25, BmBulkDays = 6;
         public const double BmBulkChance = 0.25, BmFactorMin = 0.70, BmFactorMax = 0.95, BmFactorNewMin = 0.85, BmFactorNewMax = 1.00, BmFactorUsedMin = 0.65, BmFactorUsedMax = 0.90, BmFactorBulkMin = 0.55, BmFactorBulkMax = 0.75;
+        /// <summary>商家货架上单件基础价的上限（过贵的货不上，免得一件把周转量撑歪）。</summary>
+        public const long BmMaxUnitValue = 4000;
         public const int BmBulk1Count = 5, BmBulk2Count = 10;
         public const double BmBulk1Discount = 0.05, BmBulk2Discount = 0.10;
         /// <summary>出售量越大货款越容易带污点：近 7 天成交额达到参考量时，污点概率与比例各加最多 BmVolumeTaintMax。</summary>