Complete archive listings by walking RAR headers, at low priority

Inspection lists only the entries whose headers are in the first segment
of a first volume. A walk hops from header to header, fetching one segment
per entry and volume, in its own queue (one job per collection worker) on
NNTP connections inspection isn't waiting for. content:walk-archives queues
releases inspected earlier (CONCEPT D40).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/services/QueueService.ts

@@ -41,6 +41,10 @@ class QueueService {
   get collectionQueue() {
     return this.queue('collection-queue')
   }
+  /** Complete archive listings, at low priority (ArchiveWalkService). */
+  get archiveWalkQueue() {
+    return this.queue('archive-walk-queue')
+  }
 
   /** Queues no longer used by the pipeline, kept here so GC can empty them. */
   get legacy(): Queue[] {
@@ -48,7 +52,7 @@ class QueueService {
   }
 
   get all(): Queue[] {
-    return [this.nntpFetchQueue, this.fileQueue, this.bodyQueue, this.collectionQueue]
+    return [this.nntpFetchQueue, this.fileQueue, this.bodyQueue, this.collectionQueue, this.archiveWalkQueue]
   }
 
   /** Closes the queues that were opened. */