Adds pmg proxy command group for running a long-lived MITM proxy that
intercepts all package manager traffic without requiring PMG shims or
wrappers. Targets CI/CD pipelines where env vars can be set globally.
- pmg proxy start: starts proxy with npm+pypi interceptors, writes
state file (pid/addr/ca-cert-path), auto-blocks suspicious packages
- pmg proxy stop: sends SIGTERM to the running proxy
- pmg proxy env: emits HTTP_PROXY/HTTPS_PROXY/SSL_CERT_FILE etc. as
shell exports, or writes directly to $GITHUB_ENV with --gha
- pmg proxy status: shows running/stopped status
GHA usage:
pmg proxy start &
pmg proxy env --gha # populates env for all subsequent steps
npm install # intercepted automatically, no wrapper needed
Also adds .github/workflows/persistent-proxy-e2e.yml to validate the
persistent proxy mode end-to-end in CI.
