feat: schema versioning with v2 migration (loans, last_played_at)

server/test/helpers.ts

@@ -9,11 +9,14 @@ import type { FastifyInstance } from 'fastify'
 export function testConfig(): Config {
   // artworkDir must be a real writable directory (cached images land there)
   const artworkDir = mkdtempSync(path.join(tmpdir(), 'rs-art-'))
+  // backupsDir must be a real writable directory (backup files land there)
+  const backupsDir = mkdtempSync(path.join(tmpdir(), 'rs-bak-'))
   // dataDir must be a real writable directory (release-cache payloads land there)
   const dataDir = mkdtempSync(path.join(tmpdir(), 'rs-data-'))
   return {
     dataDir,
     artworkDir,
+    backupsDir,
     dbPath: ':memory:',
     port: 0,
     sessionSecret: 'test-secret-test-secret-test-secret-1234',