Add user and employee management enhancements with database schema updates

- Introduced new columns `status`, `created_by`, and `updated_by` in the `users` table to track user status and ownership.
- Updated the `employees` table to include a foreign key reference to the `users` table via `user_id`.
- Created migration script `0012_users_primary.sql` to apply these changes to the database schema.
- Enhanced the `EmployeesService` and `EmployeesRepository` to support user assignments and related data retrieval.
- Updated DTOs and service methods to reflect the new user and employee relationships.
- Added unit tests to validate the new functionality and ensure data integrity.
- Modified existing controllers to accommodate the new fields and relationships in user and employee management.

test/sales-invoices.e2e-spec.ts

@@ -13,6 +13,7 @@ import {
   users,
 } from '../src/database/schema';
 import { PRIVILEGE_ACTIONS } from '../src/modules/privileges/privilege-action';
+import { registerAndActivate } from './helpers/activate-user';
 
 describe('Sales invoices (e2e)', () => {
   let app: INestApplication<App>;
@@ -37,21 +38,21 @@ describe('Sales invoices (e2e)', () => {
     await app.init();
     db = app.get(DRIZZLE);
 
-    const adminReg = await request(app.getHttpServer())
-      .post('/auth/register')
-      .send({ username: `si_admin_${suffix}`, password })
-      .expect(201);
-    token = (adminReg.body as { accessToken: string }).accessToken;
-    const adminMe = await request(app.getHttpServer())
-      .get('/auth/me')
-      .set('Authorization', `Bearer ${token}`)
-      .expect(200);
-    const adminUserId = (adminMe.body as { id: string }).id;
-    const otherReg = await request(app.getHttpServer())
-      .post('/auth/register')
-      .send({ username: `si_other_${suffix}`, password })
-      .expect(201);
-    otherToken = (otherReg.body as { accessToken: string }).accessToken;
+    const admin = await registerAndActivate(
+      app,
+      db,
+      `si_admin_${suffix}`,
+      password,
+    );
+    token = admin.accessToken;
+    const adminUserId = admin.userId;
+    const other = await registerAndActivate(
+      app,
+      db,
+      `si_other_${suffix}`,
+      password,
+    );
+    otherToken = other.accessToken;
 
     const now = Date.now();
     const [priv] = await db