Make sure SQLAlchemy can handle the loaded dialect

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Make sure SQLAlchemy can handle the loaded dialect #3463

Closed lonvia closed 3 days ago

lonvia commented 3 days ago

The psycopg dialect was only added in SQLAlchemy 2.0. To avoid loading errors when SQLAlchemy 1.4 is installed together with psycopg3, check that the dialect is really available.

Should fix issues like #3297.