Versioning

Crate and package versions follow SemVer once the project leaves alpha.

The C ABI has its own additive version, exposed at runtime via n4fmt_abi_version() and as the compile-time constant N4FMT_ABI_VERSION in crates/nirs4all-formats-capi/src/lib.rs (currently 0.1.0). Breaking ABI changes require a major ABI bump and migration notes. The release pipeline ships the matching nirs4all_formats.h header under crates/nirs4all-formats-capi/include/, regenerated by cbindgen on every build of nirs4all-formats-capi.

The normalized record schema also carries a schema version so serialized goldens and cached outputs can be migrated intentionally.