Fix segfault with undefined relevant_snapshot in Iceberg metadata#1211

zvonand merged 1 commit intoantalya-25.8Altinity/ClickHouse:antalya-25.8from

bugfix/antalya-25.8/fix_segfaul_system_table_glue_catalogAltinity/ClickHouse:bugfix/antalya-25.8/fix_segfaul_system_table_glue_catalogCopy head branch name to clipboard