What is the primary purpose of the invocations at the beginning of the Shri Sai Satcharitra as described in the first chapter?

The first chapter of the Shri Sai Satcharitra, titled Mangalacharan, begins with auspicious invocations to various deities. According to the text, the primary purpose for this traditional practice is to ensure the obstacle-free completion of the task of writing the book. As stated in Chapter 1, "the reason for this auspicious beginning is the removal of all obstacles; the purpose is the fulfillment of the desired goal." The author offers salutations to deities like Lord Ganesha to obtain their grace and ensure the successful writing and sharing of Sai Baba's life story.