Rebuild: the catalog API and Newznab, from voyager 1

- /api (Newznab: caps, search, tvsearch, movie, music, book, get) for
  Prowlarr, Sonarr and Radarr: voyager 1's controller and XML on the new
  catalog; readable releases not known to miss files; NEWZNAB_API_KEY.
- /api/v1/releases (q, cat, readable, complete, source, poster, size,
  sort, paging), /api/v1/releases/:id with its files (decoded from the
  chunks; NzbService.files, shared with the NZB), /api/v1/stats
  (estimates, plus history and tail progress), /health. Open, as voyager
  1's catalog; the web interface uses it.
- release_category(name): voyager 1's categorizer without the archive
  contents, a generated column with a (category, posted_at) index.
- @adonisjs/static for the web interface (next).

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

database/migrations/1770000001200_release_category.ts

@@ -0,0 +1,39 @@
+import { BaseSchema } from '@adonisjs/lucid/schema'
+
+/**
+ * A release's Newznab category from its name (REBUILD.md, part 9): voyager
+ * 1's release_category() without the archive contents (phase 2 has them).
+ * TV (5030/5040/5045), movies (2030/2040/2045), audio (3010/3040),
+ * books (7020), otherwise 8010.
+ */
+export default class extends BaseSchema {
+  async up() {
+    this.schema.raw(String.raw`
+      CREATE OR REPLACE FUNCTION release_category(name text) RETURNS integer IMMUTABLE LANGUAGE sql AS $$
+        SELECT CASE
+          -- TV: S01E02, 1x02, or a season pack (S01).
+          WHEN name ~* '(^|[._ -])(S\d{1,2}E\d{1,3}|\d{1,2}x\d{2})([._ -]|$)' OR name ~* '[._ -]S\d{1,2}([._ -]|$)' THEN
+            CASE WHEN name ~* '2160p|(^|[._ -])(uhd|4k)([._ -]|$)' THEN 5045
+                 WHEN name ~* '720p|1080p' THEN 5040 ELSE 5030 END
+          -- Movies: a year plus a source or quality marker.
+          WHEN name ~* '(^|[._ (-])(19|20)\d{2}([._ )-]|$)'
+               AND name ~* '(480p|576p|720p|1080p|2160p|blu-?ray|web-?dl|webrip|bdrip|brrip|dvdrip|hdtv|x26[45]|h\.?26[45]|hevc|remux)' THEN
+            CASE WHEN name ~* '2160p|(^|[._ -])(uhd|4k)([._ -]|$)' THEN 2045
+                 WHEN name ~* '720p|1080p|blu-?ray' THEN 2040 ELSE 2030 END
+          -- Audio: lossless, mp3, or scene music names (-WEB-2026-GROUP).
+          WHEN name ~* '(^|[._ -])flac([._ -]|$)' THEN 3040
+          WHEN name ~* '(^|[._ -])mp3([._ -]|$)' OR name ~* '-(WEB|CD|CDM|CDS|EP|VINYL|VLS|SAT|FM|DAB)-(19|20)\d{2}-[A-Za-z0-9]+$' THEN 3010
+          WHEN name ~* '(^|[._ -])(epub|ebook|mobi)([._ -]|$)' THEN 7020
+          ELSE 8010
+        END
+      $$`)
+    this.schema.raw(`ALTER TABLE releases ADD COLUMN IF NOT EXISTS category integer GENERATED ALWAYS AS (release_category(name)) STORED`)
+    // Newznab and the web interface list a category newest first.
+    this.schema.raw(`CREATE INDEX IF NOT EXISTS releases_category_posted_idx ON releases (category, posted_at DESC)`)
+  }
+
+  async down() {
+    this.schema.raw(`ALTER TABLE releases DROP COLUMN IF EXISTS category`)
+    this.schema.raw(`DROP FUNCTION IF EXISTS release_category(text)`)
+  }
+}