feat: auth improvements #451

Job	Run time
Linux Static SDK Build (6.1.2 - ubuntu-latest)	1m 53s
Test (ubuntu-latest, Swift 6.1.0)	10m 16s
Documentation	2m 19s
MCP Conformance Tests	2m 53s
Test (macos-latest, Swift 6.1.0)	4m 47s
	22m 8s

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