Improve validation of SmartREST payloads #6620

Job	Run time
Check whether Cargo.lock is up to date	1m 27s
Filter changes	2s
Block fixup commits	10s
Shellcheck	8s
Spell Check with Typos	5s
Check for unused dependencies	6m 47s
Run format checks	5m 17s
Run cargo audit	14s
Run cargo clippy	1m 51s
Run cargo test	10m 55s
Run cargo check on MSRV	1m 37s
Sort dependencies	2m 0s
nightly / doc	1m 38s
Check markdown	0s
	32m 11s

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