ServiceCount
ServiceCount returns how many services are registered and the global cap, so a caller can check headroom without pulling the whole list.
Command
gnokey query vm/qeval -remote "https://rpc.gno.land" -data "gno.land/r/g1qp5pt8cdq2f6kfdamn3yuxwg6quqnfpyewzz39/service_registry.ServiceCount()"
Result