Fix URI template derivation and lookup #490

Job	Run time
build (windows-latest, Debug)	5m 5s
build (ubuntu-latest, Debug)	4m 1s
build (windows-latest, Release)	5m 13s
build (macos-latest, Debug)	2m 22s
build (macos-latest, Release)	2m 19s
build (ubuntu-latest, Release)	2m 21s
publish-coverage	0s
	21m 21s

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