feat: fewer DB loads when linking credentials, add tracing #5137

Job	Run time
Generate SDKs	3m 32s
Run tests and lints	30m 8s
Run end-to-end tests (postgres)	42m 2s
Run end-to-end tests (cockroach)	45m 13s
Run Playwright end-to-end tests (postgres)	5m 54s
Run end-to-end tests (sqlite)	42m 42s
Run Playwright end-to-end tests (cockroach)	6m 31s
Run end-to-end tests (mysql)	42m 41s
Run Playwright end-to-end tests (sqlite)	5m 54s
Run Playwright end-to-end tests (mysql)	6m 56s
Build CLI docs	1m 17s
Generate changelog	0s
Generate release	0s
Draft newsletter	0s
Release SDKs	0s
Render version schema	0s
Pending approval Slack notification	0s
Send newsletter	0s
	3h 52m 50s

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