feat(moderation): enhance message capture and storage with thread support

- Added functions to retrieve message location, sticker metadata, and display content in messageCapture.ts.
- Updated captureMessage function to store thread information and sticker metadata in the database.
- Modified messageStore.ts to support querying messages and attachments by thread ID.
- Updated types.ts to include thread_id in AttachmentRecord.
- Altered database schema in muxer-queue.ts to add thread_id column to attachments.
- Introduced ChannelSummary interface and listWatchableChannels method in voiceController.ts to fetch watchable channels.
- Added API endpoint in webserver.ts to retrieve channels for a given guild.

src/webserver.ts

@@ -106,6 +106,14 @@ export function startWebserver(
     }
   });
 
+  app.get("/api/guilds/:guildId/channels", async (req, res, next) => {
+    try {
+      res.json(await voiceController.listWatchableChannels(req.params.guildId));
+    } catch (error) {
+      next(error);
+    }
+  });
+
   app.post("/api/connect", async (req, res, next) => {
     try {
       const { guildId, channelId } = req.body as {