By THE STAR STAFF The Puerto Rico Electric Power Authority (PREPA) ended fiscal year (FY) 2023 with higher liabilities, a deeper deficit and a renewed warning from auditors that the public utility continues to face “substantial doubt” about its ability to continue operating. The audited financial statements, released Thursday to the markets for the year ended June 30, 2023, depict a utility still struggling with long‑standing financial instability as it remains under Title III bankruptcy…