feat: store client in challenge/verified and reduce DB load #2003

Job	Run time
Generate SDKs	3m 39s
Run OIDC conformity tests	8m 22s
Run end-to-end tests (memory)	5m 7s
Run tests and lints	15m 1s
Run HSM tests	6m 23s
Run end-to-end tests (memory, --jwt)	4m 53s
Run end-to-end tests (postgres)	5m 6s
Run end-to-end tests (postgres, --jwt)	5m 1s
Run end-to-end tests (mysql)	5m 31s
Run end-to-end tests (mysql, --jwt)	5m 47s
Run end-to-end tests (cockroach)	5m 26s
Run end-to-end tests (cockroach, --jwt)	5m 51s
Generate changelog	0s
Build CLI docs	0s
Generate release	0s
Release SDKs	0s
Render version schema	0s
Draft newsletter	0s
Send newsletter	0s
Pending approval Slack notification	0s
	1h 16m 7s

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