feat: store client in challenge/verified and reduce DB load #2004

Job	Run time
Run OIDC conformity tests	8m 29s
Generate SDKs	3m 35s
Run HSM tests	6m 48s
Run end-to-end tests (memory)	5m 16s
Run tests and lints	15m 14s
Run end-to-end tests (memory, --jwt)	5m 1s
Run end-to-end tests (postgres)	4m 51s
Run end-to-end tests (postgres, --jwt)	5m 4s
Run end-to-end tests (mysql)	5m 10s
Run end-to-end tests (mysql, --jwt)	5m 22s
Run end-to-end tests (cockroach)	5m 37s
Run end-to-end tests (cockroach, --jwt)	5m 41s
Build CLI docs	1m 4s
Generate changelog	0s
Generate release	0s
Render version schema	0s
Release SDKs	0s
Draft newsletter	0s
Pending approval Slack notification	0s
Send newsletter	0s
	1h 17m 12s

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