Introduce `evicted-at`/`last-evicted` timestamps #6670

Job	Run time
prepare	2s
Check no_std	34s
Rust clippy	44s
Build & Test (1.84.0, true, --no-default-features --features miniscript/no-std)	2m 13s
Rust fmt	12s
Build & Test (1.84.0, true, --all-features)	3m 42s
Check WASM	1m 0s
Build & Test (1.63.0, --no-default-features --features miniscript/no-std)	4m 54s
Build & Test (1.63.0, --all-features)	6m 7s
Build & Test Examples (example_cli)	30s
Build & Test (1.75.0, --no-default-features --features miniscript/no-std)	2m 16s
Build & Test Examples (example_bitcoind_rpc_polling)	41s
Build & Test (1.75.0, --all-features)	3m 55s
Build & Test Examples (example_electrum)	52s
Build & Test Examples (example_esplora)	59s
Build & Test Examples (example_wallet_electrum)	50s
Build & Test Examples (example_wallet_esplora_async)	1m 2s
Build & Test Examples (example_wallet_esplora_blocking)	57s
Build & Test Examples (example_wallet_rpc)	36s
	32m 6s

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