GHSA-9gqj-5w7c-vx47: Anthropic Sandbox Runtime Incorrectly Implemented Network Sandboxing

Anthropic's sandbox-runtime failed to enforce network sandboxing, allowing sandboxed code to make unauthorized network requests; patched in v0.0.16.

Due to a bug in sandboxing logic, `sandbox-runtime` did not properly enforce a network sandbox if the sandbox policy did not configure any allowed domains. This could allow sandboxed code to make network requests outside of the sandbox. A patch for this was released in v0.0.16. Thank you to https://github.com/bendrucker for reporting this issue!