chore: import upstream snapshot with attribution

CODE_OF_CONDUCT.md

@@ -0,0 +1,41 @@
+# Zvec Code of Conduct
+
+## Our Pledge
+
+We pledge to foster an open, respectful, and harassment-free environment for everyone, regardless of age, body size, disability, ethnicity, gender identity and expression, level of experience, education, socioeconomic status, nationality, personal appearance, race, religion, or sexual identity and orientation.
+
+## Expected Behavior
+
+- Use welcoming and inclusive language
+- Respect differing viewpoints and experiences
+- Gracefully accept constructive criticism
+- Focus on what is best for the community
+- Show empathy and kindness toward others
+
+## Unacceptable Behavior
+
+- Harassment, intimidation, or discriminatory conduct
+- Trolling, insulting, or derogatory comments
+- Public or private harassment
+- Publishing others’ private information without consent
+- Any conduct that would reasonably be considered inappropriate in a professional setting
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by contacting the project team 
+at **zvec@alibaba-inc.com** (replace with your contact). All complaints will be reviewed and investigated promptly 
+and fairly.
+
+The project team is obligated to respect the privacy and security of the reporter.
+
+Consequences may include:
+- A formal warning
+- Temporary or permanent ban from project spaces
+- Removal of contributions (e.g. comments, PRs)
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 2.1, available at  
+https://www.contributor-covenant.org/version/2/1/code_of_conduct.html
+
+[homepage]: https://www.contributor-covenant.org