This diff is a part of the stack.
Introducing refactoring to the handler variable names in `AmqpManager` -> `connectInternal()` method to reflect its purposes instead of using the shorthand.
Related linear task: [[ https://linear.app/comm/issue/ENG-1495/amqp-cpp-client-throwing-a-segmentation-error-in-a-highmid-load-and | ENG-1495 ]]