This reuses the work we did some time ago to avoid regenerating the
test database unnecessarily.
In addition to being a nice convenience for developers (since any
accomulated test data is still available), this also saves about half
the time consumed in a no-op provision.
Fixes#5182.
This directory contains scripts that are used in building, managing,
testing, and other forms of work in a Zulip development environment.
Note that tools that are also useful in production belong in
scripts/ or should be Django management commands.