chore: Refactor `CommitPubRand` #509

Job	Run time
lint_test / check-mock-gen	0s
lint_test / build	1m 14s
docker_pipeline / prepare-metadata	1s
lint_test / gosec	2m 40s
lint_test / unit-tests	1m 49s
lint_test / lint	1m 1s
lint_test / integration-tests	26m 19s
docker_pipeline / docker_build (linux/amd64, ubuntu-24.04)	3m 15s
docker_pipeline / docker_build (linux/arm64, ubuntu-24.04-arm64)	3m 31s
docker_pipeline / merge_ecr	0s
docker_pipeline / merge_dockerhub	0s
	39m 50s

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