(float) env('QR_PRICE_PER_QR_GHS', 5.0), 'min_topup_ghs' => (float) env('QR_MIN_TOPUP_GHS', 5.0), 'max_pdf_bytes' => (int) env('QR_MAX_PDF_BYTES', 104857600), // 100 MB 'short_code_length' => (int) env('QR_SHORT_CODE_LENGTH', 8), 'scan_unique_window_hours' => (int) env('QR_SCAN_UNIQUE_WINDOW_HOURS', 24), ];