Improve clarity on asset mint and universe stats RPC responses #1531

Job	Run time
cross compilation	14m 17s
Compilation check	43s
Format check	29s
Docker build check	4m 22s
run itests	10m 3s
run itests postgres	10m 11s
Lint check	3m 15s
go mod check	1m 20s
RPC check	1m 55s
Sqlc check	25s
test vector check	1m 47s
run unit tests (unit-race)	6m 32s
run unit tests (unit-cover)	4m 16s
run unit tests (unit dbbackend=postgres)	7m 16s
	1h 6m 51s

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