=== GET /books/thread-check (run 1) ===
{
    "beforeSuspend": "http-nio-8090-exec-4",
    "afterSuspend": "kotlinx.coroutines.DefaultExecutor"
}

=== GET /books/thread-check (run 2) ===
{
    "beforeSuspend": "http-nio-8090-exec-6",
    "afterSuspend": "kotlinx.coroutines.DefaultExecutor"
}

=== GET /books/thread-check (run 3) ===
{
    "beforeSuspend": "http-nio-8090-exec-9",
    "afterSuspend": "kotlinx.coroutines.DefaultExecutor"
}