Elkoep-mqtt

Prevents RuntimeError caused by dictionary size changes during iteration when Home Assistant callbacks modify entity_callbacks

Some brightness values do not update the dimmer value in the HA

The dimmer's ramp generates incremental events during the dimming process. This fix addresses issue where dimmer's ramp increments prevent the last value from matching the actual state before turning off.

In the Paho MQTT client implementation, the on_connect callback is only triggered when the client actually receives a CONNACK packet from the broker. If the connection attempt times out before receiving this packet, the callback is never executed.