API consumers must not be tempted to parse ids, so we encode them as
UUIDs to prevent that.

This new endpoint allows clients to easily purge steering’s application
state. It is primarily designed for use in integration tests as outlined
in aura#387.

The endpoint is available in debug mode so that developers can inspect
the schema. However, any request to it is denied unless the
OPERATING_MODE environment variable is set to "tests". This is a
precaution for administrators that use the debug mode to analyze
application issues in production.

feat: exclude internal_not, owner_ids and created & updated fields from show serializer for calendar

This reverts commit 072a351f.

This reverts commit d1681848.

This reverts commit 8d32fab1.

This reverts commit 906b8420.