stack trace if datafaker does not have permission to write orm.yaml

[tim-band]

Found this running the datafaker docker:

docker run --rm --user $(id -u):$(id -g) --network host -e SRC_SCHEMA=public -e SRC_DSN=postgresql://tim:tim@localhost/moma -itv ./output:/data timband/datafaker

without first mkdir output. Then within the docker shell, write:

datafaker make-tables

Presumably we could get the same effect with datafaker make-tables --force after changing the ownership of an existing orm.yaml to root.