Return error for invalid or unsupported PURLs #131

Job	Run time
Run test and build (macos-14)	1m 40s
Run test and build (macos-15-intel)	3m 17s
Run test and build (ubuntu-latest)	1m 52s
Run test and build (macos-15)	2m 46s
Run test and build (ubuntu-24.04-arm)	1m 40s
	11m 15s

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