feat：新增活动日志模块，包括控制器、服务、模型及数据传输对象，更新应用模块以引入新模块，并在打卡和训练计划模块中集成活动日志记录功能。

src/activity-logs/models/activity-log.model.ts

@@ -0,0 +1,67 @@
+import { BelongsTo, Column, DataType, ForeignKey, Index, Model, Table } from 'sequelize-typescript';
+import { User } from '../../users/models/user.model';
+
+export enum ActivityEntityType {
+  USER = 'USER',
+  USER_PROFILE = 'USER_PROFILE',
+  CHECKIN = 'CHECKIN',
+  TRAINING_PLAN = 'TRAINING_PLAN',
+}
+
+export enum ActivityActionType {
+  CREATE = 'CREATE',
+  UPDATE = 'UPDATE',
+  DELETE = 'DELETE',
+}
+
+@Table({
+  tableName: 't_activity_logs',
+  underscored: true,
+})
+export class ActivityLog extends Model {
+  @Column({
+    type: DataType.UUID,
+    primaryKey: true,
+    defaultValue: DataType.UUIDV4,
+  })
+  declare id: string;
+
+  @ForeignKey(() => User)
+
+  @Column({ type: DataType.STRING, allowNull: false, comment: '用户ID' })
+  declare userId: string;
+
+  @BelongsTo(() => User)
+  declare user?: User;
+
+  @Column({
+    type: DataType.ENUM('USER', 'USER_PROFILE', 'CHECKIN', 'TRAINING_PLAN'),
+    allowNull: false,
+    comment: '实体类型',
+  })
+  declare entityType: ActivityEntityType;
+
+  @Column({
+    type: DataType.ENUM('CREATE', 'UPDATE', 'DELETE'),
+    allowNull: false,
+    comment: '动作类型',
+  })
+  declare action: ActivityActionType;
+
+  @Column({ type: DataType.STRING, allowNull: true, comment: '实体ID' })
+  declare entityId: string | null;
+
+  @Column({ type: DataType.JSON, allowNull: true, comment: '变更详情或前后快照' })
+  declare changes: Record<string, any> | null;
+
+  @Column({ type: DataType.JSON, allowNull: true, comment: '附加信息（来源、设备等）' })
+  declare metadata: Record<string, any> | null;
+
+  @Column({ type: DataType.DATE, defaultValue: DataType.NOW, comment: '发生时间' })
+  declare createdAt: Date;
+
+  @Column({ type: DataType.DATE, defaultValue: DataType.NOW })
+  declare updatedAt: Date;
+}
+
+