Report all_ready state to the telemetry file

tests/simple_telemetry_listener.c

@@ -425,6 +425,11 @@ event_loop(void)
         mstro_cdo_declare("allClientsReady", MSTRO_ATTR_DEFAULT, &ready_all_cdo);
         mstro_cdo_seal(ready_all_cdo);
         mstro_cdo_offer(ready_all_cdo);
+        mstro_pool_event dummy = NULL;
+        store_telemetry_dispatch(dummy, "%" PRIu64 ",%s,%" PRIu64 ", { %" PRIappid ",\"%s\" }\n",
+                                 mstro_clock(),
+                                 "ALL_READY", 0,
+                               -1, "SPECIAL MESSAGE");
         g_conf_read_all_sent = true;
     }