various improvements #5519

Job	Run time
cargo-deny	28s
cargo-deny-advisories	27s
check-blocking	3s
check-packetline (ubuntu-latest)	7s
lint	3m 52s
pure-rust-build	1m 56s
test	2m 30s
test-32bit (i386)	5m 54s
test-32bit (arm32v7)	4m 14s
test-fast (windows-latest)	15m 32s
test-fast (macos-latest)	3m 40s
test-fixtures-windows	15m 7s
test-fast (ubuntu-latest)	3m 54s
test-fast (ubuntu-24.04-arm)	3m 54s
test-journey	3m 59s
WebAssembly (wasm32-unknown-unknown)	1m 11s
WebAssembly (wasm32-wasip1)	47s
Tests pass	1s
	1h 7m 36s

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