Licensing Transition Checklist

• [x] Preserve the last Apache-2.0 revision on archive/apache-2.0-final.
• [x] Replace the active root license with GNU GPL version 3.
• [x] Declare GPL-3.0-or-later in project metadata.
• [x] Add a separate commercial licensing notice.
• [x] Add copyright and trademark policies.
• [x] Add CLA and DCO contribution records.
• [x] Update README, website, structured data, manifest, and generated documentation.
• [x] Update installer and portable package legal content.
• [x] Add current-license, provenance, and wording verification.
• [x] Update CI, Pages, build, and release validation paths.
• [x] Record operational, conformance, evidence, and external-material boundaries.
• [ ] Complete any organization-specific employment, invention-assignment, confidentiality, and trademark review required for a significant commercial agreement.