http://elisa.com/20251231 (7484F535) Elisa Oyj ESEF Taxonomy 2025 Taxonomy for ESEF reporting 2025-12-31_1772531461 Elisa Oyj www.elisa.com FI 2025-12-31 Elisa Oyj XBRL Taxonomy for 2025-12-31 Elisa Oyj XBRL report for 2025-12-31 en