Unified master: upgrade-plan crates (prx/schema/abi/sdk-meta/firmware/shader/deps/signatures/nid-db), new CLI commands (sdk, firmware, shader, deps, inventory, middleware, export-scan, batch-load, run), host-side emulator, SELF PRX loader fixes. Windows (x86-64) + Linux (x86-64, built on Ubuntu 24.04) binaries.