Content inspection and archive walks on seeding nodes (relay)

Inspection is split into prepare (database), probe (lib/content/probe:
downloads, decoding and parsing, no database) and apply (database).
worker:collection runs all three; seed:node with SEED_INSPECTORS leases
jobs from the same queues through the seed API (BullMQ manual leases),
fetches articles through the seed API and posts the probes back.

A node now needs only SEED_URL and SEED_TOKEN: the settings the app
requires but a node never uses get placeholders for seed:node.

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

start/routes.ts

@@ -59,6 +59,12 @@ router
     router.post('ranges/:id/done', [SeedController, 'done']).where('id', router.matchers.number())
     router.post('ranges/:id/release', [SeedController, 'release']).where('id', router.matchers.number())
     router.get('status', [SeedController, 'status'])
+    // Content inspection and archive walks on nodes (CONCEPT.md D41).
+    router.post('inspect/lease', [SeedController, 'inspectLease'])
+    router.post('inspect/done', [SeedController, 'inspectDone'])
+    router.post('inspect/failed', [SeedController, 'inspectFailed'])
+    router.post('inspect/release', [SeedController, 'inspectRelease'])
+    router.get('articles', [SeedController, 'article'])
   })
   .prefix('/api/v1/seed')
   .use(middleware.seedNode())