Context

pyproject.toml installs the mockupdb dependency group from git+https://github.com/mongodb-labs/mongo-mockup-db@master, a moving branch rather than a released version. Every environment that resolves this group re-fetches whatever commit is currently on master, so builds are not reproducible and a transient fetch failure against that branch can fail the mockupdb test tasks. mongo-mockup-db publishes releases to PyPI; the latest is 1.8.1.

Definition of done

• The mockupdb dependency group in pyproject.toml depends on a released version of mockupdb from PyPI instead of the master git ref.
• The lockfile reflects the pinned version.
• The mockupdb test tasks still pass against the released version.

Pitfalls

• Master may contain fixes or API changes not yet in the latest PyPI release (1.8.1, released 2021-10-15) — check whether any test in test/mockupdb/ relies on behavior only present past that tag before switching.
• mockupdb is a `dependency-groups` entry gated behind --group mockupdb, not a default sync group — confirm the pin doesn't change that gating.