He’s no longer a cute little kid. He’s a $185-million man. He’s no longer a quintessential underdog routinely pardoned for his bad defense, his questionable durability and his tendency to tighten up in the playoffs. He’s a big dog who needs to own it. Austin Reaves, the most beloved Laker, became the most scrutinized Laker on Wednesday with the news that he agreed to a maximum four-year, $185-million contract to remain with the team. Kudos to him for becoming the highest-paid undrafted player in league history. Props to him for declining a rich extension offer last summer to play out the season and bet on himself. Congrats to the Lakers for turning a homegrown talent into a budding superstar. Seriously, it makes you just want to hug that unkempt, headband-wearing dude and let him know how his everyman story resonates with the masses. Except that story is finished. That book has been closed. A new volume has begun. It’s called, “Is Austin Reaves Worth It?” Thus far, the answer has been no. Flash back to …