After attacks on its oil infrastructure, Saudi Arabia is moving forward with the much-anticipated initial public offering of its state-owned oil company and considering a proposal to offer investors a much bigger stake in the company than previously planned, people familiar with the matter said. The Saudi Royal Court and its advisers have been debating an eventual float of as much as 10% of the Saudi Arabian Oil Co., known as Aramco, doubling the country’s longstanding public intention to list just 5%, according to these people. …