Saudi Arabia’s finances are under pressure as it fights a war in Yemen at a time when crude prices are languishing at the lowest level in almost 12 years. The country, which counts on energy exports for 70 percent of government revenue, sold domestic bonds for the first time since 2007 last year to help fund a budget deficit that may have been the widest since 1991. Net foreign assets dropped for 10 straight months through November, the longest streak since at least 2006, to $627 billion.