Expire retained file bodies and reclaim SQLite storage

src/lib/server/auth/schema.ts

@@ -22,6 +22,7 @@ export function ensureAuthSchema(handle: Database.Database): void {
             id INTEGER PRIMARY KEY AUTOINCREMENT, actor_id TEXT, action TEXT NOT NULL,
             target_id TEXT, details TEXT NOT NULL, created_at INTEGER NOT NULL
         );
+        CREATE INDEX IF NOT EXISTS auth_audit_created_at ON auth_audit(created_at);
     `);
     initialized.add(handle);
 }