fix(c++): improve const correctness #332

Job	Run time
fetch-version / fetch-version	18s
build-dev-packages / build-modern-bpf-skeleton	2m 52s
build-dev-packages / build-win32-package	8m 20s
build-dev-packages / build-musl-package	0s
build-dev-packages / build-wasm-package	5m 1s
build-dev-packages / build-macos-package	10m 21s
build-dev-packages-arm64 / build-modern-bpf-skeleton	2m 8s
build-dev-packages-arm64 / build-musl-package	0s
build-dev-packages-arm64 / build-wasm-package	0s
build-dev-packages-arm64 / build-macos-package	0s
build-dev-packages-arm64 / build-win32-package	0s
build-dev-packages-arm64 / build-packages	18m 35s
build-dev-packages / build-packages	21m 34s
test-dev-packages-arm64 / test-packages	1m 31s
test-dev-packages / test-packages	2m 15s
publish-dev-packages / publish-packages	2m 44s
publish-dev-packages / publish-packages-deb	4m 1s
build-dev-docker / build-docker	7m 13s
build-dev-docker-arm64 / build-docker	9m 24s
publish-dev-docker / publish-docker	5m 46s
	1h 42m 3s

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