/health/detailed leaked runtime state (gateway state, connected
platforms, active-agent counts, PID, exit reason) with no auth. Gate it
behind the same Bearer auth as other API routes; plain /health stays
open for liveness probes.
Also refuse to start on a placeholder/too-short (<16 char) API_SERVER_KEY
regardless of bind address — a guessable key on a terminal-capable
endpoint is RCE-adjacent even on loopback, since any local process can
reach it. The required-key check was already unconditional; this extends
the strength floor to loopback binds too. Startup guards are hoisted
above app/background-task creation so a rejected start leaves no partial
state.
Salvaged from #44073 (external-surface hardening), split into a focused
PR per maintainer request.
Co-authored-by: Hermes Agent <agent@nousresearch.com>
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