fix: propagate caller contextvars into the Feishu adapter-owned executor

Moving the dedup flush and thread lookup from asyncio.to_thread onto the
adapter-owned pool fixed the torn-down default executor, but to_thread also
copies the caller's contextvars and run_in_executor does not. A multiplexed
profile's HERMES_HOME override and secret scope are contextvars, so those
workers silently ran under the launch profile. _run_blocking now runs the call
through contextvars.copy_context().run, matching to_thread semantics.

Review finding: _run_blocking lost the profile HERMES_HOME override / secret scope on the worker.

plugins/platforms/feishu/adapter.py

@@ -1383,9 +1383,14 @@ class FeishuAdapter(BasePlatformAdapter):
             return executor
 
     async def _run_blocking(self, func, *args):
-        """Run a blocking Feishu SDK call on the adapter-owned thread pool."""
+        """Run a blocking Feishu SDK call on the adapter-owned thread pool.
+
+        ``copy_context().run`` mirrors ``asyncio.to_thread``: the worker sees the caller's
+        profile HERMES_HOME override / secret scope (multiplexed dedup flush, thread lookup).
+        """
         loop = asyncio.get_running_loop()
-        return await loop.run_in_executor(self._get_sdk_executor(), func, *args)
+        return await loop.run_in_executor(
+            self._get_sdk_executor(), contextvars.copy_context().run, func, *args)
 
     def _shutdown_sdk_executor(self) -> None:
         """Stop the adapter-owned SDK executor without touching the loop default."""

tests/gateway/test_feishu_sdk_executor.py

@@ -98,3 +98,21 @@ async def test_is_duplicate_flush_survives_default_executor_teardown(
     finally:
         loop._default_executor = original_executor
         adapter._shutdown_sdk_executor()
+
+
+@pytest.mark.asyncio
+async def test_run_blocking_propagates_caller_contextvars(tmp_path, monkeypatch):
+    """Call sites moved off asyncio.to_thread must keep seeing the caller's context: a
+    multiplexed profile's HERMES_HOME override is a contextvar, and a worker that lost it
+    would flush dedup state / look up threads under the wrong profile."""
+    monkeypatch.setenv("HERMES_HOME", str(tmp_path))
+    from gateway.config import PlatformConfig
+    from hermes_constants import get_hermes_home_override, reset_hermes_home_override, set_hermes_home_override
+
+    adapter = FeishuAdapter(PlatformConfig())
+    token = set_hermes_home_override(str(tmp_path / "profiles" / "secondary"))
+    try:
+        assert await adapter._run_blocking(get_hermes_home_override) == str(tmp_path / "profiles" / "secondary")
+    finally:
+        reset_hermes_home_override(token)
+        adapter._shutdown_sdk_executor()