Resolves #41478 - Generic changes file for the whole feature included in a previous PR. - Tested with new changes in the proxy merged in https://github.com/fleetdm/fleet/commit/5a266bfaca3fa2b4a1f942ef130ad478b88b7a13. ## Testing - [X] Added/updated automated tests - [X] Where appropriate, [automated tests simulate multiple hosts and test for host isolation](https://github.com/fleetdm/fleet/blob/main/docs/Contributing/reference/patterns-backend.md#unit-testing) (updates to one hosts's records do not affect another) - [X] QA'd all new/changed functionality manually