By M. Corey Goldman Shares of Uber and Lyft rise on solid earnings. But they remain locked in a Game-of-Thrones-style battle. Might a merger fix their challenges? Shares of ride-hailing lynchpins Uber (UBER) – Get Uber Technologies, Inc. Report and Lyft (LYFT) – Get Lyft, Inc. Class A Report were both on the rise Thursday following strong fourth-quarter earnings numbers that showed both companies are on the post-pandemic road to recovery. Yet the duo, both of which continue to operate at a net loss, remain locked in a fierce battle for market share, raising a question that has certainly been d…