relates to #15197
This updates the handler for `/debug/errors` so that we no longer always
send a 500 response.
- [x] Changes file added for user-visible changes in `changes/`,
`orbit/changes/` or `ee/fleetd-chrome/changes`.
See [Changes
files](https://fleetdm.com/docs/contributing/committing-changes#changes-files)
for more information.
- [ ] Added/updated tests
Issue #13034
TODO: Frontend requirements will be covered in a separate PR.
# Checklist for submitter
If some of the following don't apply, delete the relevant line.
<!-- Note that API documentation changes are now addressed by the
product design team. -->
- [x] Changes file added for user-visible changes in `changes/` or
`orbit/changes/`.
- [x] Added support on fleet's osquery simulator `cmd/osquery-perf` for
new osquery data ingestion features.
- [x] Added/updated tests
- [x] Manual QA for all new/changed functionality
Related to #9571, this adds a new value to both responses which is
calculated when the Fleet server is started, and only set to `true` if
the server is properly configured for MDM.
This helps the UI to determine wether or not we should show certain UI
elements that we only want to show to servers with MDM enabled.
This adds a new mechanism to allow us to handle compatibility issues between Orbit, Fleet Server and Fleet Desktop.
The general idea is to _always_ send a custom header of the form:
```
fleet-capabilities-header = "X-Fleet-Capabilities:" capabilities
capabilities = capability * (,)
capability = string
```
Both from the server to the clients (Orbit, Fleet Desktop) and vice-versa. For an example, see: 8c0bbdd291
Also, the following applies:
- Backwards compat: if the header is not present, assume that orbit/fleet doesn't have the capability
- The current capabilities endpoint will be removed
### Motivation
This solution is trying to solve the following problems:
- We have three independent processes communicating with each other (Fleet Desktop, Orbit and Fleet Server). Each process can be updated independently, and therefore we need a way for each process to know what features are supported by its peers.
- We originally implemented a dedicated API endpoint in the server that returned a list of the capabilities (or "features") enabled, we found this, and any other server-only solution (like API versioning) to be insufficient because:
- There are cases in which the server also needs to know which features are supported by its clients
- Clients needed to poll for changes to detect if the capabilities supported by the server change, by sending the capabilities on each request we have a much cleaner way to handling different responses.
- We are also introducing an unauthenticated endpoint to get the server features, this gives us flexibility if we need to implement different authentication mechanisms, and was one of the pitfalls of the first implementation.
Related to https://github.com/fleetdm/fleet/issues/7929
