Rebuild: NZBs from the chunk store, and a catalog search

lib/nzb (buildNzb, parseNzb) from the current app; NzbService builds a
release's NZB from its chunks; GET /api/v1/releases?q= (every word of the
name) and GET /api/v1/releases/:id/nzb behind the api guard. A test stores
a batch, finds the release and reads its NZB back.

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

.adonisjs/client/registry/tree.d.ts

@@ -18,6 +18,10 @@ export interface ApiDefinition {
       destroy: typeof routes['profile.access_tokens.destroy']
     }
   }
+  releases: {
+    index: typeof routes['releases.index']
+    nzb: typeof routes['releases.nzb']
+  }
   node: {
     node: {
       lease: typeof routes['node.node.lease']