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/smart-info/smart-info.service.spec.ts

@@ -69,7 +69,7 @@ describe(SmartInfoService.name, () => {
 
       await sut.handleQueueEncodeClip({ force: false });
 
-      expect(jobMock.queue).toHaveBeenCalledWith({ name: JobName.ENCODE_CLIP, data: { id: assetStub.image.id } });
+      expect(jobMock.queueAll).toHaveBeenCalledWith([{ name: JobName.ENCODE_CLIP, data: { id: assetStub.image.id } }]);
       expect(assetMock.getWithout).toHaveBeenCalledWith({ skip: 0, take: 1000 }, WithoutProperty.CLIP_ENCODING);
     });
 
@@ -81,7 +81,7 @@ describe(SmartInfoService.name, () => {
 
       await sut.handleQueueEncodeClip({ force: true });
 
-      expect(jobMock.queue).toHaveBeenCalledWith({ name: JobName.ENCODE_CLIP, data: { id: assetStub.image.id } });
+      expect(jobMock.queueAll).toHaveBeenCalledWith([{ name: JobName.ENCODE_CLIP, data: { id: assetStub.image.id } }]);
       expect(assetMock.getAll).toHaveBeenCalled();
     });
   });