新增普拉提训练系统的数据库结构和数据导入功能

- 创建普拉提分类和动作数据的SQL导入脚本，支持垫上普拉提和器械普拉提的分类管理
- 实现数据库结构迁移脚本，添加新字段以支持普拉提类型和器械名称
- 更新数据库升级总结文档，详细说明数据库结构变更和数据导入步骤
- 创建训练会话相关表，支持每日训练实例功能
- 引入训练会话管理模块，整合训练计划与实际训练会话的关系

src/workouts/models/workout-session.model.ts

@@ -0,0 +1,79 @@
+import { Column, DataType, ForeignKey, Model, PrimaryKey, Table, BelongsTo, HasMany } from 'sequelize-typescript';
+import { TrainingPlan } from '../../training-plans/models/training-plan.model';
+import { WorkoutExercise } from './workout-exercise.model';
+
+export type WorkoutStatus = 'planned' | 'in_progress' | 'completed' | 'skipped';
+
+@Table({
+  tableName: 't_workout_sessions',
+  underscored: true,
+})
+export class WorkoutSession extends Model {
+  @PrimaryKey
+  @Column({
+    type: DataType.UUID,
+    defaultValue: DataType.UUIDV4,
+  })
+  declare id: string;
+
+  @Column({ type: DataType.STRING, allowNull: false })
+  declare userId: string;
+
+  @ForeignKey(() => TrainingPlan)
+  @Column({ type: DataType.UUID, allowNull: false, comment: '关联的训练计划模板' })
+  declare trainingPlanId: string;
+
+  @BelongsTo(() => TrainingPlan)
+  declare trainingPlan: TrainingPlan;
+
+  @HasMany(() => WorkoutExercise)
+  declare exercises: WorkoutExercise[];
+
+  @Column({ type: DataType.STRING, allowNull: false, comment: '训练会话名称' })
+  declare name: string;
+
+  @Column({ type: DataType.DATE, allowNull: false, comment: '计划训练日期' })
+  declare scheduledDate: Date;
+
+  @Column({ type: DataType.DATE, allowNull: true, comment: '实际开始时间' })
+  declare startedAt: Date;
+
+  @Column({ type: DataType.DATE, allowNull: true, comment: '实际结束时间' })
+  declare completedAt: Date;
+
+  @Column({
+    type: DataType.ENUM('planned', 'in_progress', 'completed', 'skipped'),
+    allowNull: false,
+    defaultValue: 'planned',
+    comment: '训练状态'
+  })
+  declare status: WorkoutStatus;
+
+  @Column({ type: DataType.INTEGER, allowNull: true, comment: '总时长(秒)' })
+  declare totalDurationSec: number;
+
+  @Column({ type: DataType.TEXT, allowNull: true, comment: '训练总结/备注' })
+  declare summary: string;
+
+  @Column({ type: DataType.INTEGER, allowNull: true, comment: '消耗卡路里(估算)' })
+  declare caloriesBurned: number;
+
+  @Column({ type: DataType.JSON, allowNull: true, comment: '训练统计数据' })
+  declare stats: {
+    totalExercises?: number;
+    completedExercises?: number;
+    totalSets?: number;
+    completedSets?: number;
+    totalReps?: number;
+    completedReps?: number;
+  };
+
+  @Column({ type: DataType.DATE, defaultValue: DataType.NOW })
+  declare createdAt: Date;
+
+  @Column({ type: DataType.DATE, defaultValue: DataType.NOW })
+  declare updatedAt: Date;
+
+  @Column({ type: DataType.BOOLEAN, defaultValue: false, comment: '是否已删除' })
+  declare deleted: boolean;
+}