controller: Add note about control-flow design

controller.py

@@ -835,7 +835,7 @@ def controller(
                 clogger.info(f"Process time running mean: {p_time_mean:.3f}s")
                 # Remove process from list
                 p_list.pop(i)
-                break
+                break  # TODO AW: why break here and not iterate over all processes?
 
     clogger.debug("{} experiments remaining in queue".format(queue_output.qsize()))
     p_logger.join()