KYIV/PRAGUE (Reuters) -Ukraine will continue to meet its obligations to transit Russian oil to Europe, a presidential aide said on Friday after earlier suggesting it could halt supplies via the Druzhba pipeline next year.Comments by Ukrainian presidential aide Mykhailo Podolyak, reported by local media on Friday, had suggested flows of Russian oil may stop from January, but he later said Ukraine supported EU efforts to diversify its oil supply and would not break contracts running to 2029."Ukraine has fulfilled and will fulfill its contractual obligations in full until the scheduled completion date... because it concerns our bilateral relations with European...