fix: set ResolveObject reason (#375)

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## This PR
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- Reinstate setting of ResolveObject's reason

Discovered as [integration tests
PR](#312) started failing. In
future this kind of thing will be picked up as a pipeline failure (all
the more reason to get to the bottom of the snyk security issue).

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Signed-off-by: Skye Gill <gill.skye95@gmail.com>

pkg/service/connect_service.go

@@ -405,6 +405,7 @@ func (s *ConnectService) ResolveObject(
 		variant,
 		reason,
 	))
+	res.Msg.Reason = reason
 	res.Msg.Value = val
 	res.Msg.Variant = variant
 	return res, nil