feat: ADCP 3.0.0-rc3 spec + full registry support #491

Job	Run time
Test Python 3.10	1m 15s
Test Python 3.13	1m 8s
Test Python 3.12	1m 16s
Validate conventional commit format	8s
Validate schemas are up-to-date	27s
Test Python 3.11	1m 12s
	5m 26s

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