feat(ui): IdentitySection accepts checkpointsSlot rendered inside configGrid

ui/src/pages/AppsTab/AppDeploymentPage/IdentitySection.tsx

@@ -25,12 +25,14 @@ interface IdentitySectionProps {
   stagedJar: File | null;
   onStagedJarChange: (file: File | null) => void;
   deploying: boolean;
+  checkpointsSlot?: ReactNode;
   children?: ReactNode;
 }
 
 export function IdentitySection({
   mode, environment, app, currentVersion,
-  name, onNameChange, stagedJar, onStagedJarChange, deploying, children,
+  name, onNameChange, stagedJar, onStagedJarChange, deploying,
+  checkpointsSlot, children,
 }: IdentitySectionProps) {
   const fileInputRef = useRef<HTMLInputElement>(null);
   const slug = app?.slug ?? slugify(name);
@@ -109,6 +111,8 @@ export function IdentitySection({
             </span>
           )}
         </div>
+
+        {checkpointsSlot}
       </div>
       {children}
     </div>