Improve VRF lookup past init data #820

Job	Run time
lint	34s
quicktests	1m 12s
unittests (ubuntu-latest)	2m 32s
unittests (self-hosted, linux, arm64)	2m 36s
unittests (macos-latest)	4m 14s
unittests (self-hosted, macos, arm64)	1m 21s
unittests (windows-latest)	4m 17s
Build postcli (ubuntu-latest)	46s
Build postcli (self-hosted, linux, arm64)	22s
Build postcli (macos-latest)	1m 19s
Build postcli (self-hosted, macos, arm64)	21s
Build postcli (windows-latest)	4m 0s
Publish release	0s
	23m 34s

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