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>

README.md

@@ -34,7 +34,7 @@ docker compose -f deploy/compose.dev.yaml up -d
 API (из `services/api`):
 
 ```bash
-DATABASE_URL="postgres://pipu:pipu@localhost:5432/pipu?sslmode=disable" REDIS_URL="redis://localhost:6379/0" go run ./cmd/api
+DATABASE_URL="postgres://pipu:pipu@localhost:5432/pipu?sslmode=disable" REDIS_URL="redis://localhost:6379/0" MEILI_URL="http://localhost:7700" MEILI_MASTER_KEY="dev-master-key-change-me" LIBRARY_HOST_ROOT="$PWD/../../tests/fixtures/music/out" go run ./cmd/api
 ```
 
 Веб на http://localhost:5173 (проксирует `/api` на `:8080`):