tweak(bot): Don't error from non-existent commands

src/meta/bot.py

@@ -197,3 +197,9 @@ class Bot(commands.Bot):
                 await self.add_token(row.token, row.refresh_token)
             except Exception:
                 logger.exception(f"Failed to add token for {row}")
+
+    async def event_command_error(self, payload: commands.CommandErrorPayload) -> None:
+        if isinstance(payload.exception, commands.CommandNotFound):
+            logger.debug(f"Attempt to execute nonexistent command for context {payload.context!r}")
+        else:
+            return await super().event_command_error(payload)