add(scan): Test the `RegisterKeys` scan service call #853

Job	Run time
Check deny.toml bans	29s
Check Cargo.lock is up to date	1m 34s
Check deny.toml bans --features default-release-binaries	27s
Install zebrad from lockfile without cache on ubuntu-latest	9m 1s
Check deny.toml bans --all-features	28s
Check deny.toml sources	26s
Test stable on ubuntu-latest	31m 56s
Check deny.toml sources --features default-release-binaries	28s
Check for unused dependencies	10s
Test beta on ubuntu-latest	31m 39s
Check deny.toml sources --all-features	28s
Test stable on macos-latest	59m 26s
Open or update issues for OS integration failures	0s
	2h 16m 32s

Provide feedback