* fix: alembic migrations
This commit fixes all the migrations that was half-backed, due to auto
creation in the db init before. The process was to checkout at the
commit where the migration was created, and use --autogenerate to
regenerate at the state of the migration. 4 migrations was fixed.
It also includes a workflow to ensure migration can applies correctly.
* fix: db migration check
* fix: nullable on meeting_consent
* fix: try fixing tests
* gh: use poetry cache from setup-python and remove old deps
* gh: use pipx and not setup-poetry, as per setup-python example
* server: remove pyaudio unused in current reflector
