As Notre Dame rattled off a third straight run to the Sweet Sixteen under Niele Ivey, Hannah Hidalgo became the Fighting Irish’s breakout star. The freshman guard won the Dawn Staley Award while also bringing home ACC Defensive Player of the Year to cement her place as one of the game’s rising stars. For Ivey, though, the big challenge came after the season. The transfer portal window opened after Selection Sunday, and with one of the best players in the nation on her roster, she knew keeping Hidalgo – and the rest of her team – would be paramount. “Roster retention is real,” Ivey said on Siri…