Add LICENSE file to establish open-source terms

🔍 Summary

No LICENSE file found in this repository. Without a license, the legal status of the code is unclear and contributors cannot safely use or modify it.

📋 What Needs to Be Done

• Choose an appropriate license (recommend MIT License for OpenLake projects)
• Create a LICENSE file at the repository root
• Add a license badge to README.md
• Optionally: Add license headers to source files

💡 Resources

• https://choosealicense.com/
• https://docs.github.com/en/communities/setting-up-your-project-for-healthy-contributions/adding-a-license-to-a-repository
• OpenLake likely prefers MIT for consistency across projects