cpp-desktop kits v0.20.38-2

Desktop C++ kits for RunAnywhere 0.20.38 with the local decision primitive, consumed by the wally CLI (RCLI) via find_package(RunAnywhere).

Same five kits as cpp-desktop-v0.20.38-1 (bzip2 bundled, Ubuntu 22.04 Linux floor) plus decision support on every platform: rac_decision_* C ABI (plugin ABI v13), decision.pb.h generated headers, IDL 1.5.0, llamacpp decision_ops from the pinned fork b10453.6, and prompt-format versioning (serves 3, request pins fail closed on mismatch).

Source: kit/0.20.38-decision @ 870dfa0 (release/v0.20.38 + feat/decision-primitive merge). Assets attached by cpp-desktop-kit.yml (attach_tag=cpp-desktop-v0.20.38-2).