Estimated scope of work: - Update the code to use the `run_transaction` API as described in the *Handling restarted transactions* section of the [Building an application with CockroachDB and SQLAlchemy](https://www.cockroachlabs.com/blog/building-application-cockroachdb-sqlalchemy-2/) blog post. - Update tests, other things (?) as needed.
Estimated scope of work:
run_transactionAPI as described in the Handling restarted transactions section of the Building an application with CockroachDB and SQLAlchemy blog post.