test(find): a vector-leg find is projected too — the answer is uniform

The seam hydrates the metadata and graph page paths; a vector or text leg builds
its own entities and is trimmed after the integrity guard instead. That is a
COST difference, and this pin exists so it can never quietly become an ANSWER
difference.

tests/integration/find-fields-projection.test.ts

@@ -198,6 +198,20 @@ describe('find/get({ fields }) — projection', () => {
     expect(reads).toBe(0)
   })
 
+  it('projects a vector-leg find too — the ANSWER is uniform, only the cost is not', async () => {
+    // The seam hydrates the metadata and graph page paths. A vector or text leg
+    // builds its own entities, so those rows are trimmed after the integrity
+    // guard instead. That difference is a COST difference, and this pin exists
+    // so it can never quietly become an ANSWER difference.
+    const rows = await brain.find({ query: 'post', fields: ['title'], limit: 3 })
+    for (const r of rows) {
+      const meta = (r.entity.metadata ?? {}) as Record<string, unknown>
+      expect(Object.keys(meta)).toEqual(['title'])
+      expect(meta.body).toBeUndefined()
+      expect(r.entity.id).toBe(r.id)
+    }
+  })
+
   it('get({ fields }) projects a single row through the same seam', async () => {
     const full = await brain.get(ids[0])
     const projected = await brain.get(ids[0], { fields: ['title', 'slug'] })