As quick commerce becomes India’s next e-commerce battleground, Walmart-backed Flipkart said Wednesday that its Minutes service has built a network of 1,000 micro-fulfillment centers — small, strategically located warehouses designed to enable deliveries in minutes — less than two years after launch, a milestone Amazon is also targeting as it expands its fast-delivery business in the South Asian nation. Flipkart said it plans to expand the network to 1,500 micro-fulfillment centers by the end of...