various improvements #5520

Job	Run time
pure-rust-build	1m 57s
test-fast (windows-latest)	14m 29s
test-fast (macos-latest)	3m 16s
cargo-deny	28s
test-fast (ubuntu-latest)	3m 54s
cargo-deny-advisories	27s
check-blocking	6s
test-fast (ubuntu-24.04-arm)	4m 15s
check-packetline (ubuntu-latest)	5s
lint	3m 50s
test	10m 31s
test-32bit (i386)	5m 54s
test-32bit (arm32v7)	4m 10s
test-fixtures-windows	15m 36s
test-journey	4m 10s
WebAssembly (wasm32-unknown-unknown)	1m 13s
WebAssembly (wasm32-wasip1)	41s
Tests pass	1s
	1h 15m 3s

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