In the context of optimizing a data pipeline that utilizes Delta Lake for incremental data processing, consider a scenario where the storage costs are escalating due to the accumulation of deleted files that are no longer needed for the pipeline's operations. The team is looking for a solution that not only addresses the immediate cost concern but also ensures the long-term maintainability and performance of the table. Given these requirements, what is the primary purpose of the VACUUM command in Delta Lake, and how does it contribute to the table's maintenance? Choose the best option from the following: