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)

app/api/settings/profile/route.ts

@@ -23,7 +23,7 @@ export async function PATCH(request: NextRequest) {
     }
 
     const result = await pool.query(
-      `UPDATE "user" SET name = $1, updated_at = NOW() WHERE id = $2
+      `UPDATE "user" SET name = $1, "updatedAt" = NOW() WHERE id = $2
        RETURNING id, name, email`,
       [name, session!.user.id]
     );