modules: controller: increase default sample interval to 5000ms

Increase CONTROLLER_MODULE_SAMPLE_INTERVAL_MS default to 5000ms and remove
the unused CONTROLLER_MODULE_ZBUS_SUBSCRIBER_QUEUE_SIZE option. This change
delays ZBUS queue overflows in the cloud module by reducing the rate of
sensor data requests, but does not resolve the root cause - cloud
and sensor subscriber processing remains too slow for sustained operation.

Refs: #23

Signed-off-by: Natalia Pluta <pluta.natalia.m@gmail.com>

Author: nmpluta

app/src/modules/controller/Kconfig.controller

@@ -28,7 +28,7 @@ config CONTROLLER_MODULE_THREAD_PRIORITY
 
 config CONTROLLER_MODULE_SAMPLE_INTERVAL_MS
 	int "Default sensor sampling interval (ms)"
-	default 1000
+	default 5000
 	help
 	  Default interval between sensor data requests.
 
@@ -38,12 +38,6 @@ config CONTROLLER_MODULE_THREAD_SLEEP_MS
 	help
 	  Sleep interval for the controller module thread main loop.
 
-config CONTROLLER_MODULE_ZBUS_SUBSCRIBER_QUEUE_SIZE
-	int "ZBUS subscriber queue size"
-	default 4
-	help
-	  Queue size for the ZBUS controller subscriber.
-
 config CONTROLLER_MODULE_MAX_RETRIES
 	int "Maximum error retries"
 	default 3