Add contexts and sync Schema Registry API spec to source #319

Job	Run time
determine-doc-ids	5s
Check diff (cloud-controlplane)	14s
Check diff (http-proxy)	12s
Check diff (cloud-dataplane)	11s
Check diff (schema-registry)	24s
Check diff (admin)	16s
Deploy API documentation on Bump.sh	0s
	1m 22s

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