RKO — provenance and licensing boundaries

This project is licensed under the Apache-2.0 LICENSE in this repository.

Portions derive from the earlier RKO Python implementation by Felipe Silvestre Cardoso
Roberto and João Assaoka (github.com/RKO-solver/RKO_Python, Apache-2.0); that attribution
is retained here as the license requires. The algorithms are inspired by RKO C++ v2.

Bundled reference fixtures retain their separate upstream MIT license and
provenance under src/rko_solver/examples/instances/.

engines/cpp/vendor/rko_cpp_v2 contains the algorithm headers of RKO C++ v2.0
(github.com/RKO-solver/RKO_Cpp_v2.0, revision 126e35873e50dc308795b58b8c75d37f8de4c857),
copied byte for byte under their MIT license (Copyright (c) 2025 RKO solver), whose
text is kept beside them. They are compiled only when the optional C++ backend is
requested with RKO_BUILD_CPP=1; the default build contains none of that code.

This notice does not relicense imported work or assign authorship. On 2026-10-24, the
repository owner approved the current combined Python implementation's distribution rights,
retained licenses and attribution. This is an owner attestation, not an independent legal
certification. Source code is Apache-2.0; the bundled reference fixtures
retain MIT. New third-party additions and native binary distributions require
review before publication. Every release still requires explicit owner approval.
