output_processors/postgresql: Add missing default
output_processors/postgresql: Add missing default

In the case of no screen resolution being present ensure that a default
is used instead of `None`.

setrofim/workload-automation,setrofim/workload-automation,ARM-software/workload-automation,ARM-software/workload-automation,ARM-software/workload-automation,setrofim/workload-automation,ARM-software/workload-automation,setrofim/workload-automation