Pioreactor

- `BackgroundJobWithDodging` now looks for the config.ini section `[<job_name>.config]`.

- New API for adding SQL tables via plugins, and for registering MQTT -> DB parsers.
- New topic for experiment name in MQTT: `pioreactor/latest_experiment/experiment`.
- New topic for experiment timestamp in MQTT: `pioreactor/latest_experiment/created_at`.
- `stable` renamed to `thermostat`
- new callback API for pushing the HAT button down, see `Monitor` class.

- improve reliability of self-test `test_REF_is_in_correct_position`
- improve the early OD reading signal behaviour.
- new API on jobs for `job_name` (class level now)

- The SQL triggers were not added to the images, so `pioreactor_unit_activity_data` was never populated. This is fixed.
- New web server backend. Went from js/Node to python (Flask)/lighttp.
- Export datasets now cleans up its csvs.

- Bug fixes

- temperature automation `silent` is now `only_record_temperature`.
- using new official RPi image from 2022-09-06 as a source image.
- Bug fixes