class AnyCable::Rails::Middlewares::LogTagging

See github.com/grpc/grpc-go/blob/master/Documentation/grpc-metadata.md<br><br>Session ID could be provided through gRPC metadata ‘sid` key.
Middleware to add `sid` (session ID) tag to logs.

def call(_method, _request, metadata) 

def call(_method, _request, metadata)
  sid = metadata["sid"]
  return yield unless sid
  AnyCable.logger.tagged("AnyCable sid=#{sid}") { yield }
end