修复实验成绩管理：

管理列表改为服务端分页，支持 10/20/50 条切换。
增加学期、成绩状态、开课学院以及项目/课程/教学班/教师关键词筛选。
数据范围分级：校级管理员可查看全校，院级管理员仅限本学院，教师仅限本人任课项目。
修复任课教师提交审核时报“无权限”：工作流查询现在会加载任课教师关系。
增加权限、学院隔离、分页和筛选回归测试。

src/Jiaowu.Api/Infrastructure/Persistence/Migrations/MySql/20260809123700_CourseGradeStatisticsRefreshSettings.Designer.cs

@@ -1953,6 +1953,9 @@ namespace Jiaowu.Api.Infrastructure.Persistence.Migrations.MySql
                     b.Property<Guid>("PlanId")
                         .HasColumnType("char(36)");
 
+                    b.Property<string>("ProjectIdsJson")
+                        .HasColumnType("longtext");
+
                     b.Property<Guid?>("RequestedByUserId")
                         .HasColumnType("char(36)");
 

src/Jiaowu.Api/Infrastructure/Persistence/Migrations/MySql/20260809130121_ExamArrangementJobPayload.cs

@@ -0,0 +1,28 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Jiaowu.Api.Infrastructure.Persistence.Migrations.MySql
+{
+    /// <inheritdoc />
+    public partial class ExamArrangementJobPayload : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "ProjectIdsJson",
+                table: "ExamArrangementJobs",
+                type: "longtext",
+                nullable: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "ProjectIdsJson",
+                table: "ExamArrangementJobs");
+        }
+    }
+}

src/Jiaowu.Api/Infrastructure/Persistence/Migrations/MySql/AppDbContextModelSnapshot.cs

@@ -1848,6 +1848,9 @@ namespace Jiaowu.Api.Infrastructure.Persistence.Migrations.MySql
                     b.Property<int>("ProcessedSessions")
                         .HasColumnType("int");
 
+                    b.Property<string>("ProjectIdsJson")
+                        .HasColumnType("longtext");
+
                     b.Property<Guid?>("RequestedByUserId")
                         .HasColumnType("char(36)");
 
@@ -1950,6 +1953,9 @@ namespace Jiaowu.Api.Infrastructure.Persistence.Migrations.MySql
                     b.Property<Guid>("PlanId")
                         .HasColumnType("char(36)");
 
+                    b.Property<string>("ProjectIdsJson")
+                        .HasColumnType("longtext");
+
                     b.Property<Guid?>("RequestedByUserId")
                         .HasColumnType("char(36)");