publish record endpoint changes contentSources to optional JSON field… #462

Job	Run time
Run tests (ubuntu-latest)	6m 42s
Run tests (macos-latest)	11m 41s
Run tests (windows-latest)	15m 36s
Install warg CLI	8m 15s
Run PostgreSQL tests (ubuntu-latest)	8m 59s
Format source code	24s
	51m 37s

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