Real estate, on the mend in Carson City last year, will continue an upward trend here this year if a Goldilocks market can keep the bears away. People involved in various ways with capital city real estate say they expect a good 2013, but know a Goldilocks scenario depends on the mix — the porridge, if you will — being neither too hot nor too cold. Housing inventory, mortgage interest rates and lending rules are involved.Inventory on the lean side helps, but either too lean or too flush might slow recovery. Housing stocks here are lean now.Regarding mortgages and interest …