refactor(stackable-versioned): Introduce idents for fields/variants #4466

Job	Run time
Run Cargo Deny (bans licenses sources)	50s
Run Cargo Deny (advisories)	43s
Run RustDoc	1m 48s
Run Cargo Udeps	2m 0s
Run Cargo Tests	2m 16s
All tests passed	2s
	7m 39s

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