v3.0.0 · License change to CC BY-NC 4.0

⚠️ BREAKING CHANGE — license switch from MIT to CC BY-NC 4.0.

Versions ≤ v2.1.0 remain under MIT and retain their original commercial-use rights for those specific versions. From v3.0.0 onward, commercial use is prohibited without a separate license.

Why

• Aligns with academic-research-skills (the companion empirical-research pipeline, then a designated companion), which uses the same license
• Reserves commercial rights for the author's own work (Tianyu Vision)
• Permits all non-commercial use: academic research, teaching, personal projects, open-source derivatives, internal research workflows

What changed

• LICENSE: replaced MIT text with full CC BY-NC 4.0 legal code from creativecommons.org
• README.md / README.zh.md: badge swapped; License section rewritten with change notice + Commercial Use subsection
• CITATION.cff: license field MIT → CC-BY-NC-4.0; version 2.1.0 → 3.0.0
• CONTRIBUTING.md: contributor agreement updated to CC BY-NC 4.0
• .zenodo.json: license MIT → CC-BY-NC-4.0; creator name properly upgraded to "Shen, Cong"
• BibTeX version bumped to 3.0.0

Commercial licensing

For inquiries: shencong916@gmail.com (Shen Cong · Tianyu Vision).

See CHANGELOG.md for full history.