fix(cli): replace get_event_loop() with get_running_loop() to silence RuntimeWarning in process_loop thread (#19285)

cli.py

@@ -1408,7 +1408,13 @@ def _cprint(text: str):
 
     import asyncio as _asyncio
     try:
-        current_loop = _asyncio.get_event_loop_policy().get_event_loop()
+        # Use get_running_loop() instead of get_event_loop() to avoid the
+        # DeprecationWarning / RuntimeWarning emitted by Python 3.10+ when
+        # get_event_loop() is called from a thread that has no current event
+        # loop set (e.g. the process_loop background thread).  Fixes #19285.
+        current_loop = _asyncio.get_running_loop()
+    except RuntimeError:
+        current_loop = None
     except Exception:
         current_loop = None
     # Same thread as the app's loop → safe to print directly.
@@ -12190,8 +12196,12 @@ class HermesCLI:
                 # Set the custom handler on prompt_toolkit's event loop
                 try:
                     import asyncio as _aio
-                    _loop = _aio.get_event_loop()
+                    # Use get_running_loop() to avoid DeprecationWarning on
+                    # Python 3.10+ when called outside an async context.
+                    _loop = _aio.get_running_loop()
                     _loop.set_exception_handler(_suppress_closed_loop_errors)
+                except RuntimeError:
+                    pass  # No running loop -- nothing to patch
                 except Exception:
                     pass
                 app.run()