* Full finalize the planned work for health checks of execution nodes
* Implementation of instance health_check endpoint
* Also do version conditional to node_type
* Do not use receptor mesh to check main cluster nodes health
* Fix bugs from testing health check of cluster nodes, add doc
* Add a few fields to health check serializer missed before
* Light refactoring of error field processing
* Fix errors clearing error, write more unit tests
* Update health check info in docs
* Bump migration of health check after rebase
* Mark string for translation
* Add related health_check link for system auditors too
* Handle health_check cluster node timeout, add errors for peer judgement