fix(codex): make host-credential bottles actually authenticate

Debugging a live codex smolmachines bottle surfaced three independent
failures past the sign-in screen; fix each so forward_host_credentials
works end to end:

- codex_auth: dummy access/id tokens now inherit the *real* host token's
  exp instead of now+1h. Codex (0.135) refreshes when its local token's
  JWT exp lapses; with a placeholder refresh_token that refresh fails and
  drops to the sign-in screen. Aligning exp tracks the real token's life.

- prepare: set CODEX_CA_CERTIFICATE to the agent CA bundle for codex
  bottles. Codex is rustls and ignores the system store / NODE_EXTRA_CA_
  CERTS; it reads CODEX_CA_CERTIFICATE (fallback SSL_CERT_FILE) for custom
  roots across HTTPS + wss, so it must be pointed at the egress MITM CA or
  injection can't work without tls_passthrough.

- pipelock: auto tls_passthrough the Codex API hosts when
  forward_host_credentials is on. Egress injects the bearer before
  pipelock, whose header DLP then flags the JWT ("request header contains
  secret") and the retry storm trips its 429. passthrough host-gates the
  CONNECT but skips decrypt+rescan of egress-owned auth. The auto-added
  routes aren't in bottle.egress.routes, so the hosts are added explicitly.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

bot_bottle/pipelock.py

@@ -21,7 +21,11 @@ from dataclasses import dataclass
 from pathlib import Path
 from typing import cast
 
-from .egress import EGRESS_HOSTNAME, egress_routes_for_bottle
+from .egress import (
+    CODEX_HOST_CREDENTIAL_HOSTS,
+    EGRESS_HOSTNAME,
+    egress_routes_for_bottle,
+)
 from .supervise import SUPERVISE_HOSTNAME
 from .manifest import Bottle
 
@@ -111,6 +115,19 @@ def pipelock_effective_tls_passthrough(bottle: Bottle) -> list[str]:
     for route in bottle.egress.routes:
         if route.Pipelock.TlsPassthrough:
             seen.setdefault(route.Host, None)
+    # forward_host_credentials makes egress inject the host ChatGPT bearer
+    # on the Codex API hosts AFTER the agent boundary. Pipelock sits
+    # downstream of egress and DLP-scans request headers; left to MITM
+    # these routes it flags the injected JWT as a leaked secret
+    # ("request header contains secret") and blocks. Pass them through so
+    # pipelock still enforces the host allowlist on CONNECT but does not
+    # decrypt + rescan egress-owned auth. The auto-added routes live in
+    # egress_routes_for_bottle, not bottle.egress.routes, so add the
+    # hosts explicitly here.
+    provider = bottle.agent_provider
+    if provider.forward_host_credentials and provider.template == "codex":
+        for host in CODEX_HOST_CREDENTIAL_HOSTS:
+            seen.setdefault(host, None)
     return sorted(seen.keys())