教师成绩报告

src/Jiaowu.Api/Domain/Academic/GradeEntities.cs

@@ -79,6 +79,48 @@ public sealed class CourseGradeStatistic : EntityBase
     public DateTime CalculatedAt { get; set; }
 }
 
+/// <summary>
+/// Materialized analysis for one published teaching class. Course/term
+/// organizational benchmarks stay in <see cref="CourseGradeStatistic"/>;
+/// this table is the grain used for peer-class and historical comparisons.
+/// </summary>
+public sealed class TeachingTaskGradeStatistic : EntityBase
+{
+    public Guid GradeSheetId { get; set; }
+    public GradeSheet? GradeSheet { get; set; }
+    public Guid TeachingTaskId { get; set; }
+    public TeachingTask? TeachingTask { get; set; }
+    public Guid CourseId { get; set; }
+    public Guid AcademicTermId { get; set; }
+    public int StudentCount { get; set; }
+    public int PassedCount { get; set; }
+    public int ExcellentCount { get; set; }
+    public decimal HighestScore { get; set; }
+    public decimal AverageScore { get; set; }
+    public decimal MedianScore { get; set; }
+    public decimal LowestScore { get; set; }
+    public decimal StandardDeviation { get; set; }
+    public decimal PassRate { get; set; }
+    public decimal ExcellentRate { get; set; }
+    public DateTime CalculatedAt { get; set; }
+    public ICollection<TeachingTaskGradeScoreBand> ScoreBands { get; set; } = [];
+}
+
+/// <summary>
+/// Flexible score-band rows are kept separately so future band definitions do
+/// not require widening the teaching-class summary table.
+/// </summary>
+public sealed class TeachingTaskGradeScoreBand : EntityBase
+{
+    public Guid TeachingTaskGradeStatisticId { get; set; }
+    public TeachingTaskGradeStatistic? TeachingTaskGradeStatistic { get; set; }
+    public required string Label { get; set; }
+    public decimal LowerBound { get; set; }
+    public decimal? UpperBound { get; set; }
+    public int StudentCount { get; set; }
+    public int SortOrder { get; set; }
+}
+
 public enum CourseGradeStatisticScope
 {
     AdministrativeClass = 1,