expand dbt usage in FacDB

[damonmcc]

related to #2386

• Replaced _create_facdb_agency.sql and _create_facdb_classification.sql with dbt seed models and intermediate models (facdb_agency, facdb_classification)
• Added lookup_factype.csv as a new dbt seed
• Added staging/sources.yml to declare upstream sources
• Updated cli.py to invoke dbt instead of the old SQL scripts

confirm outputs don't change

used the s3_compare notebook to compare this branch's outputs to nightly_qa. all files are virtually identical

qc_classification.csv show facsubgrp counts and they're identical

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 71.69%. Comparing base (5b0d9bb) to head (8116354).

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