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/voiceController.ts

@@ -25,6 +25,12 @@ export interface VoiceChannelSummary {
   name: string;
 }
 
+export interface ChannelSummary {
+  id: string;
+  name: string;
+  type: string;
+}
+
 export class VoiceController {
   private activeGuildId: string | null = null;
   private activeChannelId: string | null = null;
@@ -63,6 +69,27 @@ export class VoiceController {
       .sort((a, b) => a.name.localeCompare(b.name));
   }
 
+  async listWatchableChannels(guildId: string): Promise<ChannelSummary[]> {
+    const guild = this.getGuild(guildId);
+    await guild.channels.fetch().catch(() => null);
+
+    return guild.channels.cache
+      .filter((channel) =>
+        ["GUILD_TEXT", "GUILD_PUBLIC_THREAD", "GUILD_PRIVATE_THREAD"].includes(
+          channel.type,
+        ),
+      )
+      .map((channel) => {
+        const parentName = channel.isThread?.() ? channel.parent?.name : null;
+        return {
+          id: channel.id,
+          name: parentName ? `${parentName} / ${channel.name}` : channel.name,
+          type: channel.type,
+        };
+      })
+      .sort((a, b) => a.name.localeCompare(b.name));
+  }
+
   async connect(guildId: string, channelId: string): Promise<VoiceStatus> {
     if (!this.client.isReady()) {
       throw new AppError(