Theo M. Bulut

We need to implement sensors for Prometheus. To send metrics to Prometheus. In `callysto/src/sensors` and put sensible sensors across the code.

To enable custom Stream implementations.

To enable custom Sink implementations

Configure the consumers if `ExactlyOnce` is passed with ``isolation.level="read_committed"`` and producers should be configured with ``retries=isize::MAX_VALUE`` and ``enable.idempotence=true`` per default. Otherwise leave the default.

**Is your feature request related to a problem? Please describe.** Lever 0.1.1 is not compilable with latest compiler. **Describe the solution you'd like** Update to latest lever 0.1.2. **Describe alternatives...

Ongoing work of #179

Fixes #133 ##### Checklist - [ ] tests are passing with `cargo test`. - [ ] tests and/or benchmarks are included - [ ] documentation is changed or added -...

Backend traits for Persistence layer

1

**Is your feature request related to a problem? Please describe.** I want to store the state of the current mailbox and restore it when I need it. **Describe the solution...

Need to be able to spawn onto the same thread