Ensure our proxy helpers forward metadata (#1531) #123

Job	Run time
cloud-test (oldstable)	57s
build-and-test (ubuntu-latest, oldstable)	16m 38s
cloud-test (stable)	1s
build-and-test (ubuntu-latest, stable)	25m 5s
build-and-test (macos-intel, oldstable)	18m 1s
build-and-test (macos-intel, stable)	18m 1s
build-and-test (macos-arm, oldstable)	16m 57s
build-and-test (macos-arm, stable)	16m 59s
build-and-test (windows-latest, oldstable)	20m 30s
build-and-test (windows-latest, stable)	19m 57s
features-test / test	1m 59s
	2h 35m 5s

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