CVE-2026-40173: Dgraph: Unauthenticated /debug/pprof/cmdline discloses admin auth token, enabling unauthorized access to protected Alpha admin endpoints

An unauthenticated debug endpoint in Dgraph Alpha exposes the full process command line, including the configured admin token from --security "token=...".

This does not break token validation logic directly; instead, it discloses the credential and enables unauthorized admin-level access by reusing the leaked token in X-Dgraph-AuthToken.