Common healthcheck hooks

[dmichael]

Every service needs to expose a common healthcheck in some way. Not sure exactly how this should be done right now.

[mikeghen]

In python, I implement these with the RPC clients using this pattern:

class Sparkswap:
   def healthcheck():
        stub = broker_pb2_grpc.AdminServiceStub(self._channel)
        return "OK" in self._protobuf_to_dict(stub.HealthCheck(Empty())) # conditional check

How do you feel about maybe using Python to do some of this? I think Python is more accessible than Go for most people. but maybe doing this in Go is just as straight forward as the above? Idk... I imagine integration testing being complicated and think doing things in Python might be easier to understand for OOP people