Subject cleanup with bookops-marc package

[klinga]

• outsources removal of unwanted 6xx tag to bookops-marc
• dependencies update:
  • bookops-marc (to 0.8.1)
  • paramiko (to 2.11.0)
  • psycopg2 (to 2.9.3)
  • pymarc (to 4.2.0)
  • sqlalchemy (to 1.4.40)
  • dev dependencies (pytest, mypy, etc.)