* WIP

* Fix incorrect CK output adjustment

* Bug fix and enroce sanity check

* Change cycle search depth, and fix sanity check

* cpu_fusion.validate_fuse_gru_inputs passes.

* Fix as_single_output to be able to always create a GOE

* minor fix. style-apply

* Clean up debug msgs

* Switch to backward cycle check

* Enable failing test

* PR fixes

* Address feedback: Add fwd cycle checks. Make cycle checking depth configurable