`ducks` adds backports and deprecated features #3477

Job	Run time
buf	10s
cargo-deny	34s
Integration Tests	3m 12s
Kani Proofs (lading_throttle)	55s
Kani Proofs (lading_payload)	1m 16s
Loom Proofs (lading_signal)	5m 59s
Rust Actions (Check/Fmt/Clippy) (ubuntu-latest)	45s
Test Suite	30m 17s
Rust Actions (Check/Fmt/Clippy) (macos-latest)	50s
actionlint	4s
action-sha-pin-check	41s
	44m 43s

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