Nothing enters the catalog without a usable name: the pending store (decision f amended)

An unnamed release (no readable file name) is written to pending_releases
(migration 6300, the HDD) with its keys, counts, article span, upload tool
and probe targets, instead of releases, release_texts, posters and a chunk.
The edge sends it with an empty payload and its tool; the batch store splits
a batch by readable. The pending ladder (probes cheapest first, signature
verdicts, the move into the catalog) comes next. The replay report shows the
pending releases.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

lib/edge/range_indexer.ts

@@ -35,6 +35,11 @@ export interface ReleaseChunk {
   edge?: boolean
   /** A file of the release misses parts (the window closed on it): not complete, whatever the counter says. */
   partial?: boolean
+  /**
+   * Voyager 3, an unnamed release (readable false): the upload tool from its first article's message-id, its
+   * signature with the group; the payload is empty (no chunk until a probe names it: pending_releases).
+   */
+  tool?: string
   payload: Buffer
 }