`database_engine` was the DBAPI module's name, which for the Rust backend
is its Rust module rather than anything recognisable. Report the
configured engine name there, as before for sqlite3 and psycopg2, and
add `database_driver` so deployments on the native driver can be told
apart.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01ULdieJyQoHNzeHq42H2M1p