build-number

Split cdylib into divvun-runtime-ffi subcrate The root crate was ["lib", "cdylib", "staticlib"]. On Windows MSVC, cdylib's import library and staticlib both want divvun_runtime.lib and clobber each other, so the staticlib was never reaching artifact consumers. - Root [lib] is now ["lib", "staticlib"] only. - New workspace member crates/divvun-runtime-ffi is cdylib, names its output divvun_runtime (so consumers still find libdivvun_runtime.{dylib,so} / divvun_runtime.dll), and re-exports divvun_runtime::ffi via pub use. Rust's reachability analysis carries the #[no_mangle] DRT_* symbols from the rlib into the cdylib's export table. - build/build.ts buildLib now invokes cargo for both packages in one build so ./x build-lib still emits both artifacts.