Heat oven to 325F. Wrap the outside of a 9-inch springform pan tightly with two layers of heavy-duty foil. Stir graham cracker crumbs, melted butter, and sugar until the texture of wet sand. Press firmly into the bottom of the pan and about 1 inch up the sides. Bake 10 minutes until set and fragrant. Cool on a rack while you make the filling.

Beat cream cheese on medium-low speed until completely smooth, about 2 minutes, scraping the bowl twice. Add sugar and beat another 2 minutes until no grit remains. Add sour cream, vanilla, and salt; beat just until combined.

Add eggs one at a time, beating on low speed just until each disappears into the batter. Do not overbeat - this keeps the cheesecake dense and crack-free. Scrape the bowl and give a final gentle fold with a spatula to ensure no streaks remain.

Pour filling over the cooled crust. Place the springform pan inside a large roasting pan. Pour hot water into the roasting pan until it reaches halfway up the sides of the springform. Carefully transfer to the oven and bake 55-65 minutes until the edges are set and the center still jiggles slightly when you tap the pan.

Turn off the oven, crack the door open with a wooden spoon, and let the cheesecake cool inside for 1 hour. This slow cooling prevents cracking. Remove from the water bath, discard foil, and cool completely on a rack. Cover and refrigerate at least 6 hours or overnight.

Combine cranberries, sugar, and water in a medium saucepan over medium heat. Cook 10-12 minutes, stirring occasionally, until most berries have burst and the sauce thickens to a loose jam consistency. Stir in orange zest. Cool completely, then refrigerate until cold. The topping will thicken further as it chills.

Run a thin knife around the edge of the cheesecake before releasing the springform. Spoon the cold cranberry topping over the cheesecake, leaving a 1-inch border if you prefer, or cover completely. Slice with a clean, hot knife for neat cuts.