Snowflake Inc. plans to close its own investigation this week into a hacking campaign that ensnared as many as 165 of its customers.The cloud data and analytics company hasn’t detected any unauthorized access into customer accounts since early last week, Chief Information Security Officer Brad Jones, said in an interview with Bloomberg News. The company said on June 2 that hackers had launched a “targeted campaign” directed against Snowflake users that used single-factor authentication technique...