fix: handle empty strings after event removal in transcription processing (...

TnR2

2025-10-01 528f92f7a2a26cade1c57ccf26b0ba6524e7cae5

 runtime/http/bin/funasr-http-main.cpp

@@ -510,6 +510,7 @@

    s.run();
    LOG(INFO) << "http model loop " << s_port;
    conn_guard.reset();
    // wait for theads
    for (auto &t : decoder_threads) {
      t.join();