Pyref

Fix

- **fitting**: interpolate error fix
- **fitting**: anisotropy fix
- **fitting**: upated model anisotropy to be correctly evaluated
- **plotting**: updated plot to fix anisotropy plot
- moved from typechecking block
- **fitting**: updated how offsets are handled
- **fitting**: finally?
- **fitting**: again .. lets see
- **fitting**: fixed anisotropy len ... maybe...lets see
- **fitting**: update to qcomon
- **fitting**: fixed qcomon calculation
- **fitting**: fixed issue with array size mixmatch inanisotropy

Fix

- **fitting**: added energy offset to parameters
- **fitting**: model construction for s or p pol is now allowed

Fix

- **fitting**: update range of errors
- **fitting**: rollback changes to rotation for now. Larger issue than previously thought
- **fitting**: updates rotation matrix to apply 3x3 rotations instead of 2x2

Fix

- **fitting**: added passthough for error updates in model. added custom scale of the anisotropic ratio to xrr

Feat

- added anisotropic ratio as an extra condition on the log likelyhood

Fix

- updated NexafsSLD to UniTensorSLD
- fixed constraints to avoid corruption
- proper fit constraints
- typo
- typo
- constraints properly applied at instantiation
- initial state check change
- remove legacy skip_initial_state_check