Fixes #4613 - Remove duplicate scoped search from taxonomies
Fixes #8425 - n+1 query on audits index

Audits index include users who performed actions, and these are being
called with n+1 queries. Fix should be as simple as providing the
users through the controller with an includes.
Refs #3809 - Remove useless assignments
Add deployment model and its REST API
Add data-model files