pip install -r requirements.txt fails

I just did a clean re-install of my .venv directory and got a version conflict:

INFO: pip is looking at multiple versions of langchain-core to determine which version is compatible with other requirements. This could take a while.
ERROR: Cannot install -r requirements.txt (line 2) and pydantic==1.10.13 because these package versions have conflicting dependencies.

The conflict is caused by:
    The user requested pydantic==1.10.13
    langchain-core 0.2.9 depends on pydantic<3.0.0 and >=2.7.4; python_full_version >= "3.12.4"

I am inclined to say we should loosen the pydantic version spec, but I will let @gridinoc make that call.