feat: Implement Phase 2 cross-cutting services with email and notification enhancements

- Refactor email verification and password reset utilities to use new email service.
- Introduce email delivery queue and notification delivery model for better tracking.
- Enhance file validation and storage services for improved security and ownership management.
- Add cron job for cleaning inactive notifications with retention policy.
- Update document worker to handle document generation and storage more efficiently.
- Implement logging improvements in activity and log workers.
- Create comprehensive documentation for new API endpoints and services.
- Add unit tests for file validation and notification policies to ensure robustness.

app/models/activities/userActivities.model.js

@@ -18,9 +18,10 @@ module.exports = (sequelize, DataTypes) => {
         autoIncrement: true,
         primaryKey: true,
       },
+      event_id: { type: DataTypes.STRING, allowNull: true, unique: true },
       user_id: {
         type: DataTypes.STRING,
-        allowNull: false,
+        allowNull: true,
       },
       username: {
         type: DataTypes.STRING,
@@ -45,13 +46,17 @@ module.exports = (sequelize, DataTypes) => {
       activity_date:{
         type: DataTypes.DATEONLY,
         allowNull: false,
-      }
+      },
+      target_type: DataTypes.STRING, target_id: DataTypes.STRING,
+      ip_address: DataTypes.STRING, user_agent: DataTypes.STRING, request_id: DataTypes.STRING,
+      metadata: DataTypes.JSON, occurred_at: { type: DataTypes.DATE, allowNull: false, defaultValue: DataTypes.NOW },
     },
     {
       tableName: "UserActivity",
       timestamps: true,
     },
   );
+  UserActivity.associate = (models) => UserActivity.belongsTo(models.User, { foreignKey: "user_id", as: "actor", constraints: false });
 
   return UserActivity;
 };