fix: add debug output and increase delay in WAV load test

Co-authored-by: aider (deepseek/deepseek-reasoner) <aider@aider.chat>

src/looper.c

@@ -306,7 +306,9 @@ void looper_process_commands(jack_client_t *client) {
   if (atomic_exchange(&cmd_load, 0)) {
     float *buf = NULL;
     unsigned frames = 0;
+    printf("LOAD: wav_read called\n");
     if (wav_read("loop.wav", &buf, &frames) == 0 && frames > 0) {
+      printf("LOAD: success, frames=%u\n", frames);
       if (frames > LOOP_BUF_SIZE) frames = LOOP_BUF_SIZE;
       memcpy(channels[0].loop_buffer, buf, frames * sizeof(float));
       atomic_store(&channels[0].loop_count, (int)frames);
@@ -317,6 +319,7 @@ void looper_process_commands(jack_client_t *client) {
       free(buf);
     } else {
       fprintf(stderr, "Failed to load loop.wav\n");
+      printf("LOAD: FAILED\n");
     }
   }