fix: cpu contention on jwk reads + suppress duplicate jwk generation #1986

Job	Run time
Run OIDC conformity tests	6m 45s
Generate SDKs	3m 41s
Run HSM tests	2m 56s
Run end-to-end tests (memory)	2m 58s
Run end-to-end tests (memory, --jwt)	2m 58s
Run end-to-end tests (postgres)	2m 58s
Run tests and lints	2m 38s
Run end-to-end tests (postgres, --jwt)	2m 59s
Run end-to-end tests (mysql)	2m 58s
Run end-to-end tests (mysql, --jwt)	2m 59s
Run end-to-end tests (cockroach)	2m 57s
Run end-to-end tests (cockroach, --jwt)	2m 59s
Build CLI docs	0s
Generate changelog	1s
Generate release	1s
Render version schema	1s
Draft newsletter	1s
Release SDKs	1s
Send newsletter	1s
Pending approval Slack notification	1s
	39m 53s

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