Adopt lockfiles for our API partners

[Eric-Arellano]

Qiskit repos semi-regularly have CI outages that slow down everyone, including docs. For example, Runtime broke at Qiskit/qiskit-ibm-runtime#2049. Lockfiles are a simple solution to make their docs builds and CI deterministic - they also improve supply chain security.

We would help willing teams to use either uv or Poetry, specifically the API repos that hook up into this repository.