* Make native installs portable and smaller
- Support glibc 2.34 with portable compiler binaries and static LLVM helpers.
- Bundle the host runtime and discover optional cross-target packs from project dependencies.
- Add application build benchmarks covering latency, executable size, and memory.
* Keep bootstrap tools available in Sandbox validation
- Isolate Zig for native compiler bootstrap and glibc entropy contracts.
- Preserve the existing toolchain scope for cache and corpus tests.
* Fix portable compiler bootstrap linking
- Keep native support objects compatible with the destination host linker.
- Resolve installed targets using the host declared by the toolchain manifest.
