reworked quite a few things

app/db/migration/__init__.py

app/db/models/__init__.py

app/db/models/all_models.py

app/db/models/mapped_source.py

app/db/models/tracked_visualization.py

app/db/setup.py

app/db/utils.py

app/dependencies/db.py

app/dependencies/orm.py

app/logic/append.py

app/logic/connect.py

app/logic/db_actions.py

app/logic/export.py

app/logic/mapped_db.py

app/logic/migrate_schema.py

app/logic/overwrite.py

app/logic/pull_mapped.py

app/logic/refresh.py

app/logic/register.py

app/logic/upload.py