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/document/document.model.js

@@ -14,7 +14,7 @@ module.exports = (sequelize, DataTypes) => {
     "Document",
     {
       doc_id:{
-        type: DataTypes.STRING,
+        type: DataTypes.ENUM("DRAFT", "QUEUED", "PROCESSING", "COMPLETED", "FAILED"),
         primaryKey: true,
       },
       reference_no: {
@@ -34,13 +34,21 @@ module.exports = (sequelize, DataTypes) => {
         type: DataTypes.STRING,
         allowNull: false,
         defaultValue: "DRAFT",
-      }
+      },
+      created_by: { type: DataTypes.STRING, allowNull: false },
+      owner_type: { type: DataTypes.STRING, allowNull: false, defaultValue: "USER" },
+      owner_id: { type: DataTypes.STRING, allowNull: false },
+      storage_upload_id: { type: DataTypes.INTEGER, allowNull: true },
+      job_id: { type: DataTypes.STRING, allowNull: true, unique: true },
+      generated_at: DataTypes.DATE, failed_at: DataTypes.DATE, failure_code: DataTypes.STRING,
+      version: { type: DataTypes.INTEGER, allowNull: false, defaultValue: 1 },
     },
     {
       tableName: "Document",
       timestamps: true,
     },
   );
+  document.associate = (models) => { document.belongsTo(models.User, { foreignKey: "created_by", as: "creator", constraints: false }); document.belongsTo(models.Upload, { foreignKey: "storage_upload_id", as: "storageUpload", constraints: false }); };
 
   return document;
 };

app/models/document/documentType.model.js

@@ -20,8 +20,8 @@ module.exports = (sequelize, DataTypes) => {
       },
       doc_type_name: {
         type: DataTypes.STRING,
-        allowNull: true,
-        defaultValue: "N/A"
+        allowNull: false,
+        unique: true,
       },
       description: {
         type: DataTypes.JSON,