GRE-412 Improve resilience and error reporting: don't let unparseable objects reject a consistent set.
GRE-414 Adding query parameter to BGP preview page
GRE-393 Monitor TA health

= Still to do: document how to use this in readme
    hint:
      - find the stable link on the TrustAnchor page
      - grep for the text "ALERT" which appears in case of any failing checks