chore: minor cleanups before a larger one #764

Job	Run time
test-benchmark (rust, lib)	3s
test-benchmark (rust, bin)	2m 8s
test-benchmark (rust+wasm, lib)	1m 32s
test-benchmark (rust+wasm, bin)	1m 57s
test-rust-project (lib)	2s
test-rust-project (bin)	6s
changes	5s
run-pre-commit (rust, lib)	2m 51s
run-pre-commit (rust, bin)	2m 52s
run-pre-commit (rust+wasm, lib)	2m 50s
run-pre-commit (rust+wasm, bin)	2m 49s
test-rust-wasm-project (lib)	3s
test-rust-wasm-project (bin)	1m 22s
run-pre-commit-axum (rust)	2m 38s
run-pre-commit-axum (rust+wasm)	6s
test-rust-axum-project	5s
test-rust-wasm-axum-project	2m 50s
test-benchmark-axum (rust)	4s
test-benchmark-axum (rust+wasm)	2m 51s
nix-flake-check (rust)	2m 48s
nix-flake-check (rust+wasm)	2m 50s
run-examples (gen-axum)	2m 48s
test-docker (rust, glibc)	16s
test-docker (rust, musl)	13s
test-docker (rust+wasm, glibc)	2m 49s
test-docker (rust+wasm, musl)	1m 55s
test-docker-axum (rust, glibc)	1s
test-docker-axum (rust, musl)	2m 58s
test-docker-axum (rust+wasm, glibc)	3s
test-docker-axum (rust+wasm, musl)	2m 55s
	46m 50s

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