Fix URI template derivation and lookup #472

Job	Run time
build (windows-latest, Debug)	6m 55s
build (ubuntu-latest, Debug)	2m 21s
build (ubuntu-latest, Release)	2m 34s
build (windows-latest, Release)	4m 24s
build (macos-latest, Release)	1m 30s
build (macos-latest, Debug)	1m 39s
publish-coverage	-1s
	19m 22s

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