add X-Application-Sid in outdials so it ends up in cdr (#374)

lib/utils/place-outdial.js

@@ -45,6 +45,10 @@ class SingleDialer extends Emitter {
     return this.callInfo.callStatus;
   }
 
+  get applicationSid() {
+    return this.application?.application_sid || this.callInfo?.applicationSid;
+  }
+
   /**
    * can be used for all http requests within this session
    */