Add credential count for SdJwts #1098

Job	Run time
docker-build	51s
lint	39s
build (linux, amd64)	15s
test	6m 38s
build (linux, 386)	15s
build (windows, amd64)	13s
build (linux, arm64)	18s
build (darwin, arm64)	15s
build (windows, 386)	16s
build (windows, arm64)	17s
build (windows, arm)	17s
build (darwin, amd64)	16s
build (linux, arm)	17s
integration-test-serverside (f0023141ec429d912e329665f937d05b178a3fee)	1m 48s
integration-test-clientside (v0.13.2)	1m 44s
analyze	1m 45s
	16m 4s

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