[L4] Remove excessive library import and clean up edge codebase

edge/app/adapters/agent_mqtt_adapter.py

@@ -52,27 +52,5 @@ class AgentMQTTAdapter(AgentGateway):
         self.client.on_message = self.on_message
         self.client.connect(self.broker_host, self.broker_port, 60)
 
-    def start(self):
-        self.client.loop_start()
-
-    def stop(self):
-        self.client.loop_stop()
-
-
-# Usage example:
-if __name__ == "__main__":
-    broker_host = "localhost"
-    broker_port = 1883
-    topic = "agent_data_topic"
-    # Assuming you have implemented the StoreGateway and passed it to the adapter
-    store_gateway = HubGateway()
-    adapter = AgentMQTTAdapter(broker_host, broker_port, topic, store_gateway)
-    adapter.connect()
-    adapter.start()
-    try:
-        # Keep the adapter running in the background
-        while True:
-            pass
-    except KeyboardInterrupt:
-        adapter.stop()
-        logging.info("Adapter stopped.")
+    def loop_forever(self):
+        self.client.loop_forever()

edge/app/interfaces/agent_gateway.py

@@ -26,15 +26,8 @@ class AgentGateway(ABC):
         pass
 
     @abstractmethod
-    def start(self):
+    def loop_forever(self):
         """
-        Method to start listening for messages from the agent.
-        """
-        pass
-
-    @abstractmethod
-    def stop(self):
-        """
-        Method to stop the agent gateway and clean up resources.
+        Method to await for new messages.
         """
         pass