Fix in-db configuration in dev environment

Fix in-db configuration in dev environment

Previously, in-db configuration only worked when `warnings_as_errors`
was disabled because re-compiling scrubbers on application restart
created a warning about module conflicts. This patch fixes that
by enabling `ignore_module_conflict` option of the compiler at runtime,
and enables `warnings_as_errors` in prod since there is no reason
to keep it disabled anymore.