atomic_db_session must be able to close an open transaction

[krylosov-aa]

Sometimes you might encounter a situation like this: you're working with a context session and need to wrap a new query in a new transaction. To avoid committing previous manually, you could set a parameter in atomic_db_session so that it automatically commits the current transaction and starts a new one.

[krylosov-aa]

atomic_db_session automatically commits the current transaction and starts a new one