You are managing a Fabric tenant which includes a lakehouse called Lakehouse1. Within Lakehouse1, there is a Delta table comprising one million Parquet files. Your task is to identify and eliminate files that have not been referenced by the Delta table in the last 30 days. It is crucial that this process preserves the consistency of the transaction log and maintains the ACID (Atomicity, Consistency, Isolation, Durability) properties of the table. What steps should you take to achieve this?