- Removes cancellation support from async_run.
- Simplifies async operations.
- Removes async_run_lean.
- Remove support for implicit cancellation from health-checker.
- Reuses async_run parallel group for health-checker tasks.
- Moves the resolver from the runner to the connection.
- Moves the connector from the runner to the connection_base class.
- Moves the ssl handshaker to the connection_base class.
- Moves the health-check to the connection_base class.
- Simplifies cancel operations.
- Improvements in logging.
- Remove ssl handshaker.
- Removes run_op from runner and renames runner to resp3_handshaker.
