Circular Import Error: Cannot Import model_legacy in harmonic/utils.py

[AB-physics]

When running tests with pytest, I encounter a circular import error in harmonic/utils.py at the line:
from harmonic import model_legacy
This error occurs because harmonic/init.py imports utils, leading to a circular dependency. Please consider either moving this import inside the functions that use it (lazy import) or updating the import to the new location if model_legacy has been renamed.

[alicjapolanska]

Thank you for pointing this out @AB-physics ! We've moved the import to the inside of the function in #314.