As struggling drugstore chains work to regain their footing, Walgreens is doubling down on automation. The company is expanding the number of retail stores served by its micro-fulfillment centers, which use robots to fill thousands of prescriptions for patients who take medications to manage or treat diabetes, high blood pressure and other conditions. Walgreens aims to free up time for pharmacy staff, reducing their routine tasks and eliminating inventory waste. Fewer prescription fills would allow employees to interact directly with patients and perform more clinical services such as vaccinations and testing. Walgreens first rolled out the robot-powered centers in 2021, but paused expansion in 2023 to focus on gathering feedback and improving performance at existing sites. After more than a year of making upgrades, including new internal tools, the company said it is ready to expand the reach of that technology again. Walgreens told CNBC it hopes to have its 11 micro-fulfillment centers serve more…