Fix Typing event so that it returns undefined rather than null

Added clean data to message entity so it respects json tags.

src/api/routes/channels/#channel_id/messages/index.ts

@@ -508,7 +508,7 @@ router.post(
                 channel_id: channel_id,
                 data: message.toJSON(),
             } satisfies MessageCreateEvent),
-            message.guild_id ? Member.update({ id: req.user_id, guild_id: message.guild_id }, { last_message_id: message.id }) : null,
+            message.guild_id ? Member.update({ id: req.user_id, guild_id: message.guild_id }, { last_message_id: message.id }) : undefined,
         ]);
 
         // no await as it shouldnt block the message send function and silently catch error

src/api/routes/channels/#channel_id/typing.ts

@@ -58,7 +58,7 @@ router.post(
                 channel_id,
                 timestamp,
                 user_id,
-                guild_id: channel.guild_id,
+                guild_id: channel.guild_id ?? undefined,
             },
         } satisfies TypingStartEvent);