chore: minor cleanups before a larger one #762

Job	Run time
run-pre-commit (rust, lib)	9m 4s
run-pre-commit (rust, bin)	8m 56s
run-pre-commit (rust+wasm, lib)	10m 9s
run-pre-commit (rust+wasm, bin)	11m 27s
test-rust-project (lib)	1m 14s
test-rust-project (bin)	58s
changes	6s
test-benchmark (rust, lib)	2m 2s
test-benchmark (rust, bin)	2m 5s
test-benchmark (rust+wasm, lib)	1m 31s
test-benchmark (rust+wasm, bin)	1m 40s
test-rust-wasm-project (lib)	1m 35s
test-rust-wasm-project (bin)	1m 40s
test-rust-wasm-axum-project	9m 56s
run-pre-commit-axum (rust)	16m 7s
run-pre-commit-axum (rust+wasm)	12m 44s
test-benchmark-axum (rust)	8m 39s
test-benchmark-axum (rust+wasm)	8m 36s
nix-flake-check (rust)	7m 39s
nix-flake-check (rust+wasm)	1m 40s
test-docker (rust, glibc)	19s
test-docker (rust, musl)	23s
test-docker (rust+wasm, glibc)	2m 52s
test-docker (rust+wasm, musl)	4m 13s
test-rust-axum-project	8m 33s
run-examples (gen-axum)	5m 1s
test-docker-axum (rust, glibc)	3m 17s
test-docker-axum (rust, musl)	27s
test-docker-axum (rust+wasm, glibc)	3m 5s
test-docker-axum (rust+wasm, musl)	14m 37s
	2h 40m 35s

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