The Infinity Files By S.M. Wilson:

Ash Yang dreamed of being a starfighter pilot. But when she crashes out of her final test – literally – she somehow lands the most powerful job in the universe. As Guardian of the Infinity Files she must secretly planet-hop through the galaxies, stealing or returning treasures that have the power to stop wars...or start them.⁠⠀
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But when her home planet is the one at war, can she get the job done?⁠⠀