Verify that we don't need to port the DB version checking code

[rafidka]

Overview

Context: #41 (comment)

Acceptance Criteria

• Verify that our version checking mechanism doesn't allow the wrong Airflow version to be installed.
  • Thus, verify that it is not possible to accidentally bump the DB version.
• Verify that there is no other need for the Alembic version checking.

Alternatively, if we discover that we do actually need to port the Alembic version checking, then the acceptance criteria is:

• Port the version checking code.
• Test it.

Additional Info

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