feat: commonizes several FDv2 related types in Server #239

Job	Run time
build-test-helpers (19, windows-latest)	42s
build-test-helpers (8, ubuntu-latest)	1m 40s
build-test-helpers (19, ubuntu-latest)	34s
build-test-helpers (8, ubuntu-latest)	1m 37s
build-test-helpers (19, windows-latest)	2m 33s
build-test-helpers (19, ubuntu-latest)	1m 29s
	8m 35s

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