A missing first article is an inspection result, not a failure

Eweka answers 'no such article' after ~450 ms; a quarter of inspection
requests were for missing articles and each failed job was retried up
to three times. Files get content_type 'missing' instead; homelab also
records it from failure reports of nodes not rebuilt yet.

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

tests/unit/probe.spec.ts

@@ -71,9 +71,16 @@ test.group('content probe', () => {
     assert.lengthOf(probe.archive!.entries, 0)
   })
 
-  test('a missing article fails the probe (the job is retried)', async ({ assert }) => {
+  test('a missing first article is a result, not a failure (no retries)', async ({ assert }) => {
     const { task, fetch } = posted('gone.bin', Buffer.alloc(10, 1))
     task.segments[0].id = 'missing@test'
-    await assert.rejects(() => probeInspection(task, fetch), /430/)
+    assert.include(await probeInspection(task, fetch), { contentType: 'missing' })
+    // Through the seed relay: 410.
+    const relayed = await probeInspection(task, async () => {
+      throw new Error('Seed API /api/v1/seed/articles?id=x: 410 {"error":"No such article"}')
+    })
+    assert.equal(relayed.contentType, 'missing')
+    // Anything else still fails (and is retried).
+    await assert.rejects(() => probeInspection(task, async () => { throw new Error('NNTP BODY: no answer within 120 s') }), /no answer/)
   })
 })