test(infra): 缩短测试库连接超时 30s→2s 并加入 MSTest 并行 .runsettings

UnitTestProject/appsettings.json: 四个连接串 Connection Timeout=30→2，无库环境连不上 2 秒即失败，避免逐个 DB 测试 30s 空转；有库时 LAN 连接<1s 不受影响。新增 .runsettings: Workers=0(自动取 CPU 核数)+Scope=TestClass 类级并行，opt-in(仅 --settings 生效)；共享静态单例(LogFactory/DataCacheManager/YLServiceLocator)启用前先跑串行基线确认无交叉污染。

.runsettings

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  MSTest 并行化配置（opt-in：仅在 `dotnet test --settings .runsettings` 时生效）。
+  Workers=0 自动取 CPU 核数；Scope=TestClass 比 Method 安全（同类内静态单例不互踩）。
+  注意：本仓库测试共享静态状态（LogFactory / DataCacheManager / YLServiceLocator 单例，见 UnitTestProject/Program.cs M1）。
+  启用前务必先跑一次串行基线，确认无交叉污染后再作为默认。
+-->
+<RunSettings>
+  <MSTest>
+    <Parallelize>
+      <Workers>0</Workers>
+      <Scope>TestClass</Scope>
+    </Parallelize>
+  </MSTest>
+</RunSettings>

UnitTestProject/appsettings.json

@@ -1,9 +1,9 @@
 {
   "ConnectionStrings": {
-    "ylcms": "server=192.168.2.96;uid=DBAdmin;pooling=true;port=3306;pwd=YieldChain$$2025;database=glms_yltrs_ylcms;charset=utf8;Allow User Variables=True;SslMode=none;Connection Timeout=30;IgnoreCommandTransaction=true;",
+    "ylcms": "server=192.168.2.96;uid=DBAdmin;pooling=true;port=3306;pwd=YieldChain$$2025;database=glms_yltrs_ylcms;charset=utf8;Allow User Variables=True;SslMode=none;Connection Timeout=2;IgnoreCommandTransaction=true;",
-    "yladmin": "server=192.168.2.96;uid=DBAdmin;pooling=true;port=3306;pwd=YieldChain$$2025;database=glms_yltrs_admin;charset=utf8;Allow User Variables=True;SslMode=none;Connection Timeout=30;IgnoreCommandTransaction=true;",
+    "yladmin": "server=192.168.2.96;uid=DBAdmin;pooling=true;port=3306;pwd=YieldChain$$2025;database=glms_yltrs_admin;charset=utf8;Allow User Variables=True;SslMode=none;Connection Timeout=2;IgnoreCommandTransaction=true;",
-    "ylclient": "server=192.168.2.96;uid=DBAdmin;pooling=true;port=3306;pwd=YieldChain$$2025;database=glms_yltrs_client;charset=utf8;Allow User Variables=True;SslMode=none;Connection Timeout=30;IgnoreCommandTransaction=true;",
+    "ylclient": "server=192.168.2.96;uid=DBAdmin;pooling=true;port=3306;pwd=YieldChain$$2025;database=glms_yltrs_client;charset=utf8;Allow User Variables=True;SslMode=none;Connection Timeout=2;IgnoreCommandTransaction=true;",
-    "bondoms": "server=192.168.2.96;uid=DBAdmin;pooling=true;port=3306;pwd=YieldChain$$2025;database=zszq_bond_oms;charset=utf8;Allow User Variables=True;SslMode=none;Connection Timeout=30;IgnoreCommandTransaction=true;"
+    "bondoms": "server=192.168.2.96;uid=DBAdmin;pooling=true;port=3306;pwd=YieldChain$$2025;database=zszq_bond_oms;charset=utf8;Allow User Variables=True;SslMode=none;Connection Timeout=2;IgnoreCommandTransaction=true;"
   },
   "LibreOffice": {
     "ExePath": "",