What events led to Sai Baba arriving in Shirdi and how did he get his name, as described in the introduction?

The introduction in Chapter 0 explains that a figure known as Maharaj was staying at the house of a man named Chandbhai. When Chandbhai's wife's nephew had a wedding fixed with a girl from Shirdi, Maharaj joined the wedding procession. Upon arrival, the group stopped near the Khandoba temple, where Maharaj met a goldsmith named Mhalasapati. Seeing Maharaj in his kafni and cap, Mhalasapati greeted him with the words "Aavo Sai Baba" (Come, Sai Baba). As the text recounts, Maharaj held onto this name for the rest of his life.