Save which agent is running a task. This is now visible in the admin UI
in the queue and in the agent details screen.
# changes
- [x] save id of agent executing a task
- [x] add endpoint to get tasks of an agent for #999
- [x] show assigned agent-id in queue
- [x] (offtopic) use same colors for queue stats and icons (similar to
the ones used by pipelines)
- [x] (offtopic) use badges for queue labels & dependencies

# Changes
- Adds an admin view to see the whole work-queue of the server.
- The admin can also pause / resume the queue.
- The view is reloading data every 5 seconds automatically.
- The task model from queue got removed in favor of the one from models.
- allow repo names to be case-insensitive
- improve backend error handling on DB get errors (record not found ->
404, else -> 500)
- replace magic numbers of http response codes
- unify the look and feel of cancel / save buttons on forms and view
them in one line
---------
Co-authored-by: Lauris BH <lauris@nix.lv>
* Implement database changes and store methods for global and organization secrets
* Add tests for new store methods
* Add organization secret API and UI
* Add global secrets API and UI
* Add suggestions
* Update warning style
* Apply suggestions from code review
Co-authored-by: Anbraten <anton@ju60.de>
* Fix lint warning
Co-authored-by: Anbraten <anton@ju60.de>