feat(egress-proxy): cutover from cred-proxy (PRD 0017 chunk 2)

Hard cutover. cred-proxy is deleted; egress-proxy is now the agent's
HTTP_PROXY (when routes are declared) with pipelock on its outbound
leg. Two per-bottle CAs are minted: egress-proxy's (agent trust
store) and pipelock's (egress-proxy's outbound trust store).

Manifest:
  - `bottle.cred_proxy` → hard error with a migration recipe.
  - `bottle.egress_proxy` is the new shape (PRD 0017 chunk 1).
  - CredProxy* types + role validators removed.

Wiring:
  - launch.py: `egress_proxy_tls_init` mints the egress-proxy CA
    (cert+key concat for mitmproxy + cert-only for agent trust);
    `DockerEgressProxy.start` docker-cps both CAs in, sets
    `HTTPS_PROXY=pipelock` + `EGRESS_PROXY_UPSTREAM_CA` so mitmdump
    trusts pipelock's MITM. Agent's HTTP_PROXY points at
    egress-proxy when routes exist, else falls back to pipelock
    (no-routes bottles unchanged).
  - prepare.py / backend.py: `cred_proxy` arg → `egress_proxy`;
    sidecar-orphan probe + plan field + dashboard view all
    renamed.
  - provision_ca: selects the egress-proxy CA when present, else
    pipelock's (filename renamed to claude-bottle-mitm-ca.crt).
  - bottle.provision: cred-proxy dotfile rewrites (~/.npmrc,
    ~/.gitconfig insteadOf, tea config) are gone — HTTP_PROXY
    catches everything respecting it.

Pipelock helpers:
  - `pipelock_token_hosts` → `pipelock_route_hosts` (now reading
    egress_proxy.routes).
  - cred-proxy hostname auto-allow → egress-proxy hostname
    auto-allow.
  - Anthropic seed-phrase workaround now triggers when an
    egress_proxy route targets api.anthropic.com (was based on the
    cred-proxy `anthropic-base-url` role).

Dockerfile.egress-proxy:
  - Entrypoint conditionally passes
    `--set ssl_verify_upstream_trusted_ca=$EGRESS_PROXY_UPSTREAM_CA`
    (via the `${VAR:+...}` shell expansion) so standalone runs without
    a mounted pipelock CA still boot.
  - mkdirs `/home/mitmproxy/.mitmproxy` ahead of `docker cp`.

Deleted: claude_bottle/{cred_proxy,cred_proxy_server}.py,
backend/docker/{cred_proxy,provision/cred_proxy}.py,
Dockerfile.cred-proxy, plus the corresponding unit + integration
tests. backend/docker/cred_proxy_apply.py stays as a stub for
chunk 3 to rewrite (its container-name + routes-path constants
are inlined so it survives without the deleted module).

Test changes:
  - test_pipelock_allowlist rewritten against egress-proxy routes
    + the new `pipelock_route_hosts`.
  - test_manifest_md_load + test_pipelock_yaml + test_yaml_subset
    fixtures migrated to the `egress_proxy: { routes: [...] }`
    shape.
  - test_supervise_sidecar's round-trip test switched from
    `dashboard.approve` to `dashboard.reject`: the approval-apply
    path on cred-proxy-block proposals hits a deleted sidecar in
    chunk 2's transitional state. Chunk 3 restores the approval
    test once the remediation flow is retargeted at egress-proxy.

376 tests pass (was 427; net delta is removed cred-proxy tests).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

claude_bottle/backend/docker/cred_proxy_apply.py

@@ -22,15 +22,25 @@ import subprocess
 import tempfile
 from pathlib import Path
 
-from .cred_proxy import (
-    CRED_PROXY_ROUTES_IN_CONTAINER,
-    cred_proxy_container_name,
-)
+# Constants inlined from the deleted `claude_bottle.backend.docker.
+# cred_proxy` module (PRD 0017 chunk 2 cutover). Chunk 3 retargets
+# this file at egress-proxy and gets rid of these.
+CRED_PROXY_ROUTES_IN_CONTAINER = "/run/cred-proxy/routes.json"
+
+
+def _cred_proxy_container_name(slug: str) -> str:
+    return f"claude-bottle-cred-proxy-{slug}"
 
 
 class CredProxyApplyError(RuntimeError):
     """Raised when fetch / apply fails. Caller renders to the
-    operator; does not crash the dashboard."""
+    operator; does not crash the dashboard.
+
+    PRD 0017 chunk 2 deletes the cred-proxy sidecar; this module's
+    docker-exec calls now hit a non-existent container and raise
+    CredProxyApplyError with a "container not running" message,
+    which the dashboard surfaces to the operator. Chunk 3 retargets
+    everything at egress-proxy."""
 
 
 def fetch_current_routes(slug: str) -> str:
@@ -38,7 +48,7 @@ def fetch_current_routes(slug: str) -> str:
     for `slug`. Returns the file content as a string. Raises
     CredProxyApplyError if the sidecar isn't reachable or the read
     fails."""
-    container = cred_proxy_container_name(slug)
+    container = _cred_proxy_container_name(slug)
     r = subprocess.run(
         ["docker", "exec", container, "cat", CRED_PROXY_ROUTES_IN_CONTAINER],
         capture_output=True, text=True, check=False,
@@ -80,7 +90,7 @@ def apply_routes_change(slug: str, new_content: str) -> tuple[str, str]:
     sidecar are unchanged if the failure is before docker cp, and
     are reverted in spirit if SIGHUP fails (cp landed but reload
     didn't fire — caller's next attempt will SIGHUP again)."""
-    container = cred_proxy_container_name(slug)
+    container = _cred_proxy_container_name(slug)
     before = fetch_current_routes(slug)
     validate_routes_json(new_content)