test(medications): pin skipDuplicates flag on intake-route backfill

The W-SERVER-FIX-2 race-guard work added `skipDuplicates: true` to the
intake route's projection-backfill createMany alongside the schema
@@unique([userId, medicationId, scheduledFor, source]) constraint. The
existing unit test asserted the row shape but not the flag, so a
regression that drops `skipDuplicates: true` while keeping the unique
constraint would surface as a 5xx in prod (constraint violation
bubbles through) without breaking the suite.

Adds the flag to the `toMatchObject` assertion so the defense-in-depth
contract stays pinned next to the row shape it pairs with. Matches the
equivalent assertion the dashboard summary test already carries.

src/app/api/medications/intake/__tests__/route.test.ts

@@ -201,6 +201,15 @@ describe("GET /api/medications/intake", () => {
           source: "REMINDER",
         },
       ],
+      // v1.4.39 W-SERVER-FIX-2 — the createMany must ship
+      // `skipDuplicates: true` so a concurrent dashboard-summary hit
+      // can't race a duplicate `(userId, medicationId, scheduledFor,
+      // REMINDER)` row in between this route's existence probe and
+      // insert. The schema-level @@unique([userId, medicationId,
+      // scheduledFor, source]) is the structural backstop; this flag
+      // is the defense-in-depth that keeps the route returning 2xx
+      // when the constraint rejects the second mint.
+      skipDuplicates: true,
     });
   });