Add support for order-by and limit in saved queries

[plypaul]

Description

This PR updates the saved-query protocol / implementation to support saved queries. Validations are added in subsequent PRs.

Checklist

• [x] I have read the contributing guide and understand what's expected of me
• [x] I have signed the CLA
• [x] This PR includes tests, or tests are not required/relevant for this PR
• [x] I have run changie new to create a changelog entry