ASHDOD, Israel — The US assault on Iran has meant a return to life underground here for Israeli hotel worker Daniella Aharoni. In the 10 days since US and Israeli forces took out the supreme leader, Ali Khamenei, Iran has launched a barrage of attacks on Israel and its Gulf neighbors. The incoming drone and missile strikes have put Israel’s Iron Dome defense system to the test, but also put locals here in a constant state of high alert. Alarms sound over loud speakers and warning messages are