OTTAWA — Prime Minister Mark Carney plans to make a potentially important visit to India in the next couple of months, government officials have confirmed, as Canada continues efforts to diversify trade, attract investment and mend international fences.   While government officials emphasize that the trip hasn’t been finalized and wouldn’t necessarily mean any deals if it occurs, the intensity of the planning in Ottawa suggests that the two countries are trying to heal wounds and perhaps revive talks on the comprehensive trade deal that they almost signed under former prime ministers...