Add HVTracker trust badge to README

Hi maintainers,

We recently added ChatDev to HVTracker, where we independently track public trust and maintenance signals for open-source AI agent projects. Your live profile is here:

• Profile: https://hvtracker.net/agents/chatdev/
• HVTrust score: 57.1/100
• Evidence grade: C

Why this might be useful

HVTracker monitors signals that matter for supply-chain safety — signed commits, provenance visibility, license compliance, dependency freshness, maintenance cadence, and more. Having this information surfaced in one place helps contributors and downstream users make faster trust decisions about the tools they depend on.

Adding the badge to your README gives users an independent, at-a-glance view of the project's safety posture — and clicking through lets them inspect the full breakdown. It also helps surface areas where safety signals could be strengthened (e.g., enabling commit signing, adding a SECURITY.md, improving provenance metadata).

Early adopters

Projects like Haystack by deepset have already adopted HVTracker badges in their README, and others like AIPass are in the process of adding them. As more projects participate, the ecosystem gets a shared, transparent baseline for trust.

Badge snippets (ready to use)

[![HVTrust](https://hvtracker.net/badge/chatdev.svg)](https://hvtracker.net/agents/chatdev/)
[![Evidence Grade](https://hvtracker.net/badge/chatdev-grade.svg)](https://hvtracker.net/agents/chatdev/)

The badges are dynamically generated and always reflect the latest public data — no manual updates needed.

No pressure

Totally fine to close this if it's not the right time. We just wanted to make sure the option was on your radar. If anything on the ChatDev profile page looks inaccurate, we're happy to correct it — just let us know.

Thanks for building in the open!

Open the repository README and add the two provided HVTrust and Evidence Grade badge snippets near the existing project badges or introduction. Check that both badge images and links point to the ChatDev HVTracker profile and render correctly in Markdown; done means the README visibly includes both badges.