Related to T3922

black is considered stable since release 22.1.0 and the version
we are currently using is quite outdated and not compatible with
click 8.1.0, so it is time to bump it to its latest stable release.

Please note that E501 pycodestyle warning related to line length
is replaced by B950 one from flake8-bugbear as recommended by black.
https://black.readthedocs.io/en/stable/the_black_code_style/current_style.html#line-length

Related to T3922

This is heavily inspired by https://archive.softwareheritage.org/swh:1:cnt:c6dda7698c6aecf71f744e4e4c01bc3e115db880;origin=https://forge.softwareheritage.org/source/snippets.git;visit=swh:1:snp:c2e3170b9927f3d356e120546b00f5a9d25a224c;anchor=swh:1:rev:fa9e387ba5e3470b93a5c5a8773ed598ef03d211;path=/vlorentz/analyze_consistency_failures.py
but reorganized to the database instead of ad-hoc text and pickle files.

Currently, this only implements recovering from Git origins.

pytest-postgresql 3.1.3 and pytest-redis 2.4.0 added support for
pytest >= 7 so we can now drop the pytest pinning.

as well as the run() method.

For consistency with a future module called fixer.py

Due to test modules being copied in subdirectories of the
build directory by setuptools, it makes pytest fail by raising
ImportPathMismatchError exceptions when invoked from root
directory of the module.

So ignore the build folder to discover tests.