* add metrics and tracing to state manager * propagate tracer to state manager * add scheduler metrics * fix backtesting * add test for state metrics * remove StateUpdateCount * update docs * metrics can be null * add tracer to new tests
* add metrics and tracing to state manager * propagate tracer to state manager * add scheduler metrics * fix backtesting * add test for state metrics * remove StateUpdateCount * update docs * metrics can be null * add tracer to new tests