feat(api): search with Meilisearch (M2)

- artists, albums and tracks indexes are rebuilt from PostgreSQL next
  to the live ones and swapped in, so search keeps working; a rebuild
  runs on start, after every scan and when a source is removed
- transliteration fields (Кино ↔ kino) and a retry in the other
  keyboard layout (ghbdtn → привет) reported as corrected_query
- /search/suggest (3 artists, 3 albums, 5 tracks), /search by type
  with cursor pages, /admin/search/reindex; Meilisearch is part of
  /readyz
- found ids are hydrated from the catalog, so a lagging index never
  returns deleted entries

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

deploy/compose.dev.yaml

@@ -45,6 +45,10 @@ services:
     environment:
       DATABASE_URL: postgres://pipu:pipu@postgres:5432/pipu?sslmode=disable
       REDIS_URL: redis://redis:6379/0
+      MEILI_URL: http://meilisearch:7700
+      MEILI_MASTER_KEY: dev-master-key-change-me
+      INTERNAL_TOKEN: dev-internal-token
+      COOKIE_SECURE: "false"
       LOG_LEVEL: debug
     ports: ["127.0.0.1:8080:8080"]
     depends_on: