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/metadata/metadata.service.ts

@@ -196,9 +196,9 @@ export class MetadataService {
     });
 
     for await (const assets of assetPagination) {
-      for (const asset of assets) {
-        await this.jobRepository.queue({ name: JobName.METADATA_EXTRACTION, data: { id: asset.id } });
-      }
+      await this.jobRepository.queueAll(
+        assets.map((asset) => ({ name: JobName.METADATA_EXTRACTION, data: { id: asset.id } })),
+      );
     }
 
     return true;
@@ -264,10 +264,12 @@ export class MetadataService {
     });
 
     for await (const assets of assetPagination) {
-      for (const asset of assets) {
-        const name = force ? JobName.SIDECAR_SYNC : JobName.SIDECAR_DISCOVERY;
-        await this.jobRepository.queue({ name, data: { id: asset.id } });
-      }
+      await this.jobRepository.queueAll(
+        assets.map((asset) => ({
+          name: force ? JobName.SIDECAR_SYNC : JobName.SIDECAR_DISCOVERY,
+          data: { id: asset.id },
+        })),
+      );
     }
 
     return true;