TEL AVIV, Israel — Israeli officials obtained Hamas’ battle plan for the Oct. 7 terrorist attack more than a year before it happened, documents, emails and interviews show. But Israeli military and intelligence officials dismissed the plan as aspirational, considering it too difficult for Hamas to carry out. The approximately 40-page document, which Israeli authorities code-named “Jericho Wall,” outlined, point by point, exactly the kind of devastating invasion that led to the deaths of about 1,200 people. The translated document, which was reviewed by The New York Times, did not set a date for the attack, but described a methodical...