This strategy uses ErrorTrackingOpenAPI client.

* Introduce OpenApiStrategy and `list_errors`
* Implement find_error call
* Implement update_error in error repository
* Implement last_event_for to view stacktraces
* Implement report_error which raises an error
* Use extracted StacktraceBuilder
* Disable FF use_click_house_database_for_error_tracking in specs
* Configure error tracking API URL via envvar
* Error Tracking: Handle error ID as string not as a number
* Error Tracking: Expose correct DSN when used with ClickHouse backend
* Parse cursor from HTTP headers
* Support search term (query) when listing errors
* Don't truncate title for now
* Support (approximated) user count
* Support first and last release version
* Use GitLab logger
* Add specs for open_api_strategy