As a podiatrist, it is amazing how many people I see who have some type of limb length discrepancy, which they haven’t noticed before. In your case (structural limb length discrepancy), I would think a heel lift incorporated into an insole would be the best fit. I don’t think you need “full correction”, but slightly less of a lift would be sufficient, along with doing soft tissue work around the hip musculature to adjust your body properly.