fix: "user" table writes use "updatedAt" not updated_at

Two more sites with the same bug as the theme route — Better Auth's "user"
table column is quoted camelCase. Caught via UAT after the theme PUT fix.

- app/api/settings/profile/route.ts:26 (PATCH admin profile name)
- lib/bootstrap.ts:97 (clearSetupFlag — first-login setup wizard)

lib/bootstrap.ts

@@ -94,7 +94,7 @@ export async function userRequiresSetup(userId: string): Promise<boolean> {
 export async function clearSetupFlag(userId: string): Promise<void> {
   try {
     await pool.query(
-      'UPDATE "user" SET requires_setup = false, updated_at = NOW() WHERE id = $1',
+      'UPDATE "user" SET requires_setup = false, "updatedAt" = NOW() WHERE id = $1',
       [userId]
     );
   } catch (error) {