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/upload/upload.model.js

@@ -43,12 +43,21 @@ module.exports = (sequelize, DataTypes) => {
         type: DataTypes.STRING,
         allowNull: false,
       },
+      storage_provider: { type: DataTypes.STRING, allowNull: false, defaultValue: "S3" },
+      safe_name: { type: DataTypes.STRING, allowNull: true },
+      checksum: { type: DataTypes.STRING(64), allowNull: true },
+      owner_type: { type: DataTypes.STRING, allowNull: false, defaultValue: "USER" },
+      owner_id: { type: DataTypes.STRING, allowNull: false },
+      visibility: { type: DataTypes.ENUM("PRIVATE", "PUBLIC"), allowNull: false, defaultValue: "PRIVATE" },
+      status: { type: DataTypes.ENUM("PENDING", "AVAILABLE", "FAILED", "DELETED"), allowNull: false, defaultValue: "PENDING" },
+      deletedAt: { type: DataTypes.DATE, allowNull: true },
     },
     {
       tableName: "uploads",
       timestamps: true,
     },
   );
+  upload.associate = (models) => upload.belongsTo(models.User, { foreignKey: "uploaded_by", as: "uploader", constraints: false });
 
   return upload;
 };