[FEATURE] - Add a enable flag configuration to decide whether to init the pulsar connection

[airclear]

Is your feature request related to a problem? Please describe.
set auto-start to false, It still seems to connect the pulsar server

Describe the solution you'd like
Add a enable flag configuration to decide �whether to init the pulsar connection

[majusko]

I tried to implement this, and it's not that easy, as the bean creation is expected in multiple places. This would include some refactoring, so I will implement it in case of more people ask for such a feature.