OSS compliance: add Apache-2.0 legal deliverables (LICENSE/NOTICE/CONTRIBUTING)

[larabasegg]

OpenSource Ally — compliance deliverables

This PR was prepared by the Prosus OpenSource Ally automated compliance audit.
It adds the standalone Apache-2.0 legal deliverable files that were missing.

Files added / updated in this PR

• M CONTRIBUTING.md

Remaining manual steps (NOT in this PR)

• README: add the license badge + copyright notice shown below.
• Source headers: add the Apache-2.0 header to source files (kept out of this PR to avoid a large diff).

Suggested README snippet

<!--
OSS compliance fix snippet for README.md (DRY RUN — not applied to README).
The README already has an Apache-2.0 license badge, but it is missing an
explicit copyright notice. Add the copyright line below to the License section
near the bottom of README.md.
-->

## License

Apache License 2.0. See [LICENSE](LICENSE).
Third-party attribution and notices: [NOTICE](NOTICE).

Copyright © 2026 MIH AI B.V.

Canonical source-file header

Copyright © 2026 MIH AI B.V.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

--
Canonical source-file header (DRY RUN — not applied). Prepend to each of the
39 Python source files (0/39 currently carry a header), commented per language:
Python: prefix each line with '# ' or wrap in a module docstring.

Generated by the OpenSource Ally audit agent. Please review before merging.

🤖 Generated with Claude Code