Merge feat-chv-muse-p9: inference/telemetry restricted channel

- executor.py: P9 _inference_gate inserted before P1 dispatcher
  _run_with_vm; gate call is the first statement, so deny/ask
  fail-closed before any resident resume or cold wake. P9's own
  _run_with_vm (old-body variant) dropped: its body is byte-identical
  to P1 _run_cold (verbatim move), kept once in _run_cold.
- sentinel.py: P9 superset version wins (P5 base + inference entries
  POST /v1/responses, GET /v1/models + comments).
- inference_channel.py / telemetry.py / host.py: P9 as-is.
- Tests: P9 51 + closeup/gaps/optimize/cloud_hypervisor/fix 272 OK.
- mypy on changed files: P9's 5 cross-track errors gone (P5
  capabilities.py now in tree); remaining 4 are 06c3e17 baseline
  legacy (marker_tools.py:142, executor.py:1573/1578), untouched.

cloud/tests/test_chv_optimize.py

@@ -86,6 +86,12 @@ def _write(path, content=b"x"):
     return path
 
 
+def _public_resolver(host, port):
+    """feat-chv-muse-p9：假解析器（公网 IP），供推理出口预审用；
+    实验室绝不联网，真实解析只在真机发生。"""
+    return ["93.184.216.34"]
+
+
 class ChvOptCase(unittest.TestCase):
     def setUp(self):
         self.tmp = tempfile.TemporaryDirectory()
@@ -118,7 +124,11 @@ class ChvOptCase(unittest.TestCase):
                # genisoimage，测的不是 host key 模式，故显式
                # 声明实验室路径，绝不把它写成生产默认。
                "CHV_HOST_KEY_MODE": "keyscan",
-               "CHV_SSH_FORWARD": "1"}
+               "CHV_SSH_FORWARD": "1",
+               # feat-chv-muse-p9：推理出口预审的假 origin（公网
+               # https，配假解析器；实验室不起真 VM、不联网）。
+               "SUB2API_BASE_URL": "https://xgapi.lol",
+               "CHV_INFERENCE_ORIGIN": "https://xgapi.lol"}
         if env_extra:
             env.update(env_extra)
         if runner is None:
@@ -135,7 +145,9 @@ class ChvOptCase(unittest.TestCase):
             runner=runner, launcher=launcher, api_client=api_client,
             sleeper=lambda s: None, env=env)
         kwargs.update(overrides)
-        return CloudHypervisorExecutor(**kwargs)
+        ex = CloudHypervisorExecutor(**kwargs)
+        ex.sentinel_resolver = _public_resolver
+        return ex
 
     def _default_runner(self, cmd, timeout=None):
         self.calls.append(list(cmd))