[vyrnsynx]

Closes #1580

In Kernel.process_control, Kernel.dispatch_shell, and Kernel.shell_channel_thread_main, self.session.feed_identities(msg, copy=False) was called immediately before the try ... except Exception: block that wraps self.session.deserialize(...) (whereas Kernel.shell_main already wrapped both inside try ... except Exception:).

When a non-Jupyter connection or malformed message without the <IDS|MSG> delimiter arrives on the shell or control port, feed_identities raises ValueError: DELIM not in msg_list. Because shell_channel_thread_main and dispatch_control are registered directly as ZMQStream.on_recv callbacks in ipykernel 7, the uncaught ValueError escaped into ZMQStream._log_error (tornado.general), printing the traceback into the active notebook cell's stderr output instead of logging it to self.log.

Move feed_identities inside the existing try ... except Exception: blocks in process_control, dispatch_shell, and shell_channel_thread_main so malformed messages missing DELIM are logged via self.log.error(...) as in 6.x.