feat: 重构项目结构，添加 WPF 应用

- 将核心功能提取到 WCTDataMiner.Core 类库
- 添加 WCTDataMiner.Wpf 桌面应用
- 支持数据解析、导出、统计等功能

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/WCTDataMiner.Core/Models/TestScenario.cs

@@ -0,0 +1,30 @@
+namespace WCTDataMiner.Core.Models;
+
+/// <summary>
+/// 测试场景实体 - 通过外键关联各维度表
+/// </summary>
+public class TestScenario
+{
+    public Guid Id { get; set; } = Guid.NewGuid();
+    public Guid TxPanelId { get; set; }
+    public Guid TxHardwareId { get; set; }
+    public Guid TxSoftwareId { get; set; }
+    public Guid RxTypeId { get; set; }
+    public string? TestPurpose { get; set; }
+    public DateOnly TestDate { get; set; }
+    public int TestSequence { get; set; } = 1;
+    public int QfodCount { get; set; } = 0;
+    public int PlossCount { get; set; } = 0;
+    public bool IsDeleted { get; set; } = false;
+    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+
+    // Navigation Properties - 维度表
+    public TxPanel TxPanel { get; set; } = null!;
+    public TxHardware TxHardware { get; set; } = null!;
+    public TxSoftware TxSoftware { get; set; } = null!;
+    public RxType RxType { get; set; } = null!;
+
+    // Navigation Properties - 数据记录
+    public ICollection<QfodRecord> QfodRecords { get; set; } = [];
+    public ICollection<PlossRecord> PlossRecords { get; set; } = [];
+}