feat(server): Enqueue jobs in bulk (#5974)

* feat(server): Enqueue jobs in bulk

The Job Repository now has a `queueAll` method, that enqueues messages
in bulk (using BullMQ's
[`addBulk`](https://docs.bullmq.io/guide/queues/adding-bulks)),
improving performance when many jobs must be enqueued within the same
operation.

Primary change is in `src/domain/job/job.service.ts`, and other services
have been refactored to use `queueAll` when useful.

As a simple local benchmark, triggering a full thumbnail generation
process over a library of ~1,200 assets and ~350 faces went from
**~600ms** to **~250ms**.

* fix: Review feedback

server/src/domain/user/user.service.spec.ts

@@ -342,7 +342,7 @@ describe(UserService.name, () => {
       userMock.update.mockResolvedValue({ ...userStub.admin, profileImagePath: file.path });
 
       await sut.createProfileImage(authStub.admin, file);
-      await expect(jobMock.queue.mock.calls).toEqual([[{ name: JobName.DELETE_FILES, data: { files } }]]);
+      expect(jobMock.queue.mock.calls).toEqual([[{ name: JobName.DELETE_FILES, data: { files } }]]);
     });
 
     it('should not delete the profile image if it has not been set', async () => {
@@ -352,6 +352,7 @@ describe(UserService.name, () => {
 
       await sut.createProfileImage(authStub.admin, file);
       expect(jobMock.queue).not.toHaveBeenCalled();
+      expect(jobMock.queueAll).not.toHaveBeenCalled();
     });
   });
 
@@ -361,6 +362,7 @@ describe(UserService.name, () => {
 
       await expect(sut.deleteProfileImage(authStub.admin)).rejects.toBeInstanceOf(BadRequestException);
       expect(jobMock.queue).not.toHaveBeenCalled();
+      expect(jobMock.queueAll).not.toHaveBeenCalled();
     });
 
     it('should delete the profile image if user has one', async () => {
@@ -368,7 +370,7 @@ describe(UserService.name, () => {
       const files = [userStub.profilePath.profileImagePath];
 
       await sut.deleteProfileImage(authStub.admin);
-      await expect(jobMock.queue.mock.calls).toEqual([[{ name: JobName.DELETE_FILES, data: { files } }]]);
+      expect(jobMock.queue.mock.calls).toEqual([[{ name: JobName.DELETE_FILES, data: { files } }]]);
     });
   });
 
@@ -456,6 +458,7 @@ describe(UserService.name, () => {
 
       expect(userMock.getDeletedUsers).toHaveBeenCalled();
       expect(jobMock.queue).not.toHaveBeenCalled();
+      expect(jobMock.queueAll).toHaveBeenCalledWith([]);
     });
 
     it('should queue user ready for deletion', async () => {
@@ -465,7 +468,7 @@ describe(UserService.name, () => {
       await sut.handleUserDeleteCheck();
 
       expect(userMock.getDeletedUsers).toHaveBeenCalled();
-      expect(jobMock.queue).toHaveBeenCalledWith({ name: JobName.USER_DELETION, data: { id: user.id } });
+      expect(jobMock.queueAll).toHaveBeenCalledWith([{ name: JobName.USER_DELETION, data: { id: user.id } }]);
     });
   });
 

server/src/domain/user/user.service.ts

@@ -129,12 +129,11 @@ export class UserService {
 
   async handleUserDeleteCheck() {
     const users = await this.userRepository.getDeletedUsers();
-    for (const user of users) {
-      if (this.isReadyForDeletion(user)) {
-        await this.jobRepository.queue({ name: JobName.USER_DELETION, data: { id: user.id } });
-      }
-    }
-
+    await this.jobRepository.queueAll(
+      users.flatMap((user) =>
+        this.isReadyForDeletion(user) ? [{ name: JobName.USER_DELETION, data: { id: user.id } }] : [],
+      ),
+    );
     return true;
   }