refactor: migrate Casbin to in-memory enforcer with database-stored t… #306

Job	Run time
test / Test (cli)	2m 56s
test / Test (artifact-cas)	1m 39s
test / Test (main-module)	4m 56s
test / Test (controlplane)	7m 45s
init_attestation	11s
Release CLI and control-plane/artifact-cas container images	13m 56s
Finish Attestation	17s
modify_release_notes	7s
	31m 47s

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