Fix *SNCL.py for variation HEZ data

See merge request !406

I failed to copy a key line from SNCL.py (and I failed to notice because I neglected to run unit tests again before committing).

I neglected to run unit tests before the previous commit, and failed to notice that a returned variable could possibly be undefined. Fixed.

use sqlite in mages instead of working around the errors

See merge request !405

Fix mage conditional

See merge request !404

Fix broken imports related to the __init__.py changes for /ws endpoints

See merge request !403

Use the pymysql library to connect to the db

See merge request !402

Fix broken server references from reworking __init__.py and imports

See merge request !401

Database Standardization

See merge request !385

Replaced databases library with sqlmodel library. Organized code to include a /factories and /models under /db to move the metadata code under /api. Removed the contents of __init__.py to be empty files to follow the working agreement and clean up imports.

Minor miscellaneous fixes

See merge request !400

Create and use default Absolute class/module values, rather than hard-coding `shift` or `valid` values

- LegacySNCL's get_channel() now requires `data_type` argument
- For some reason, specifying a location code was intended to behave differently than specifying a `data_type` in SNCL.py. I can't imagine why, but I basically reverted a change made several years ago in commit 4fab9678 when I recently forced 'variation' and 'R?' to be treated the same way by SNCL.py.

There is an ambiguity that exists between `data_type` and `location` in *SNCL.py. Ideally, we'd clean this up, but that involves many changes, and well beyond just the *SNCL.py files. These changes at least fix issues with geomagio scripts that popped up during testing.

Handles case of broken IAGA2002 file where the channel headers don't align perfectly with the expected columns. Our IAGA2002 files never did this, but some from others did.

Clean up to support and/or match geomagio scripts

See merge request !399

- `--ouput-scale-factor` for EdgeFactory and MiniSeedFactory
- `--ouput-sncl-mode` for EdgeFactory and MiniSeedFactory

- Remove unnecessary DED filtering; just copy to new sncls
- Trust *SNCL.py to map `HEZ` channel codes correctly (still uses `UVW` when applying calibrations to 10Hz volts and bins)
- Add `T5` to ObsRIO minute filtering

Update version metadata for new release

See merge request !398

Copy F (geomag) to F (legacy) fixed:

See merge request !397

The EdgeFactory (earthworm client) does not have, and will probably never have, the ability to read floating point miniseed blocks. When we reverted the processing recently to stop making an integer copy of the 1-second data from ObsRio (which seriously confused Edge for reasons we still dont understand), this broke geomag-filter. The solution was to copy F data separately, using MiniSeedFactory as the input factory.