fix(ui): stabilize company chat result topology

opc/plugins/office_ui/frontend_src/tests/message-list-scroll.spec.ts

@@ -472,7 +472,7 @@ async function runTimelineIdentityCases(page: Page, baseUrl: string): Promise<vo
       collapsed: !!committed.querySelector('.msg-collapse-toggle'),
     }
   })
-  assert.equal(finalizedDraft.reused, true, 'draft -> runtime_v2_assistant final must reuse the same outer timeline DOM node')
+  assert.equal(finalizedDraft.reused, true, 'draft -> runtime_v2_company_assistant final must reuse the same outer timeline DOM node')
   assert.equal(finalizedDraft.collapsed, false, 'a mounted expanded draft must not auto-collapse when its final arrives')
   assert.ok(
     finalizedDraft.height >= draftGeometry.height - 4,

opc/plugins/office_ui/frontend_src/tests/message-list-scroll.tsx

@@ -366,7 +366,8 @@ function Fixture() {
           mentions: [],
           metadata: {
             canonical_turn_id: LIVE_TURN_ID,
-            transcript_kind: 'runtime_v2_assistant',
+            result_delivery_id: `result:${LIVE_TURN_ID}:attempt:0`,
+            transcript_kind: 'runtime_v2_company_assistant',
           },
         },
       ])