fix(mqtt): restore legacy outbox behavior for QoS0 async publishes

Update the PsychicMqttClient to ensure that QoS0 messages are enqueued with durable outbox storage. This change addresses issues with false-failure semantics in certain connected paths, improving message flow reliability. Additionally, modify platformio.ini to include SSL certificate generation and adjust build flags for reduced verbosity and enhanced functionality.

lib/PsychicMqttClient/src/PsychicMqttClient.cpp

@@ -519,10 +519,10 @@ int PsychicMqttClient::publish(const char *topic, int qos, bool retain, const ch
     if (async)
     {
         ESP_LOGV(TAG, "Enqueuing message to topic %s with QoS %d", topic, qos);
-        // QoS0 telemetry is high-rate and does not need durable outbox storage.
-        // Avoiding store=true reduces small allocation churn in reconnect storms.
-        // Keep store=true for QoS1/2 so status/control semantics remain durable.
-        bool store_in_outbox = (qos > 0);
+        // Hotfix: restore legacy outbox behavior for QoS0 async publishes.
+        // This avoids false-failure semantics from enqueue(store=false) on some
+        // connected paths where packet topics stop flowing.
+        bool store_in_outbox = true;
         return esp_mqtt_client_enqueue(_client, topic, payload, length, qos, retain, store_in_outbox);
     }
     else

variants/heltec_v3/platformio.ini

@@ -467,6 +467,11 @@ lib_deps =
 
 [env:Heltec_WSL3_repeater_observer_mqtt]
 extends = Heltec_lora32_v3
+extra_scripts =
+  ${esp32_base.extra_scripts}
+  pre:scripts/generate_cert_bundle.py
+board_ssl_cert_source = adafruit
+board_build.embed_files = src/certs/x509_crt_bundle.bin
 build_flags =
   ${Heltec_lora32_v3.build_flags}
   -D ADVERT_NAME='"MQTT Observer"'
@@ -478,12 +483,14 @@ build_flags =
   -D MAX_MQTT_BROKERS=3
   -D MQTT_MAX_PACKET_SIZE=1024
   -D MQTT_DEBUG=1
-  -D MESH_PACKET_LOGGING=1
-  -D MESH_DEBUG=1
+  -D MQTT_MEMORY_DEBUG=1
+; Keep default observer profile less verbose to reduce runtime contention.
+;  -D MESH_PACKET_LOGGING=1
+;  -D MESH_DEBUG=1
   -D CONFIG_MBEDTLS_CERTIFICATE_BUNDLE=y
   -D ESP32_CPU_FREQ=160
-  -D MQTT_WIFI_TX_POWER=WIFI_POWER_19_5dBm
-  -D MQTT_WIFI_POWER_SAVE_DEFAULT=1
+  -D MQTT_WIFI_TX_POWER=WIFI_POWER_11dBm
+  -D WITH_SNMP=1
 #  -D WIFI_SSID='"ssid"'
 #  -D WIFI_PWD='"password"'
 #  -D MQTT_SERVER='"your-mqtt-broker.com"'
@@ -494,6 +501,7 @@ build_src_filter = ${Heltec_lora32_v3.build_src_filter}
   +<helpers/bridges/MQTTBridge.cpp>
   +<helpers/MQTTMessageBuilder.cpp>
   +<helpers/JWTHelper.cpp>
+  +<helpers/SNMPAgent.cpp>
   +<../examples/simple_repeater>
 lib_deps =
   ${Heltec_lora32_v3.lib_deps}
@@ -502,6 +510,7 @@ lib_deps =
   bblanchon/ArduinoJson
   arduino-libraries/NTPClient
   JChristensen/Timezone
+  0neblock/SNMP_Agent
   paulstoffregen/Time@1.6.1
 
 [env:Heltec_v3_kiss_modem]