feat: add user token secret management for channels

- Implemented user token secret generation and retrieval in channel service.
- Added ResetUserTokenSecret method to reset the user token secret for channels.
- Updated channel configuration parsing to include user token secret.
- Enhanced WebSocket service to utilize user token secret for external info retrieval.
- Modified dashboard channel edit component to support user token secret display and reset functionality.
- Introduced API endpoint for resetting user token secret.
- Updated IM and SDK configurations to include user token.
- Added tests for user token verification logic.

web/lib/im-realtime.ts

@@ -26,6 +26,12 @@ export function createImRealtimeConnection() {
     (config.externalSource ?? "web_chat").trim() || "web_chat"
   )
   const channelId = encodeURIComponent(config.channelId || "")
+  const userToken = (config.userToken ?? "").trim()
+  if (userToken) {
+    return new WebSocket(
+      `${baseUrl}/api/ws/open?channelId=${channelId}&userToken=${encodeURIComponent(userToken)}`
+    )
+  }
   const externalName = (config.externalName ?? "").trim()
   const nameQuery =
     externalName !== ""