fix(cli): catch KeyboardInterrupt during flush_memories on exit (NousResearch#3025)

KeyboardInterrupt inherits from BaseException, not Exception, so the
except Exception: clauses wrapping flush_memories() on exit paths
silently skipped the flush when the user pressed Ctrl+C. This could
lose conversation memory.

Change both call sites to except (Exception, KeyboardInterrupt): so
the memory flush is attempted even during interrupt.

Salvaged from PR NousResearch#2855 by RufusLin (dropped unrelated bundled changes).

Author: teknium1

cli.py

@@ -2881,7 +2881,7 @@ def new_session(self, silent=False):
         if self.agent and self.conversation_history:
             try:
                 self.agent.flush_memories(self.conversation_history)
-            except Exception:
+            except (Exception, KeyboardInterrupt):
                 pass
 
         old_session_id = self.session_id
@@ -7206,7 +7206,7 @@ def _restart_recording():
             if self.agent and self.conversation_history:
                 try:
                     self.agent.flush_memories(self.conversation_history)
-                except Exception:
+                except (Exception, KeyboardInterrupt):
                     pass
             # Shut down voice recorder (release persistent audio stream)
             if hasattr(self, '_voice_recorder') and self._voice_recorder: