style(a2a): apply ruff format to integration test helper

Apply ruff format to robot/helper_a2a_session_plan_lifecycle_integration.py
to fix CI lint failure. Changes are purely formatting (whitespace, line
wrapping) with no logic modifications.

ISSUES CLOSED: #10032

robot/helper_a2a_session_plan_lifecycle_integration.py

@@ -146,9 +146,7 @@ def _session_full_lifecycle() -> None:
     sessions = session_svc.list()
     assert len(sessions) >= 1, f"Expected at least 1 session, got {len(sessions)}"
     session_ids = [s.session_id for s in sessions]
-    assert session_id in session_ids, (
-        f"Created session {session_id} not in list"
-    )
+    assert session_id in session_ids, f"Created session {session_id} not in list"
 
     # 3. Show (get) session by ID
     fetched = session_svc.get(session_id)
@@ -278,26 +276,30 @@ def _event_queue_receives_events() -> None:
     assert sub_id, "Expected a subscription ID"
 
     # Publish events simulating plan lifecycle transitions
-    event_queue.publish(A2aEvent(
-        event_type="TaskStatusUpdateEvent",
-        plan_id="test-plan-001",
-        data={"phase": "strategize", "state": "queued"},
-    ))
-    event_queue.publish(A2aEvent(
-        event_type="TaskStatusUpdateEvent",
-        plan_id="test-plan-001",
-        data={"phase": "execute", "state": "processing"},
-    ))
-    event_queue.publish(A2aEvent(
-        event_type="TaskStatusUpdateEvent",
-        plan_id="test-plan-001",
-        data={"phase": "apply", "state": "applied"},
-    ))
+    event_queue.publish(
+        A2aEvent(
+            event_type="TaskStatusUpdateEvent",
+            plan_id="test-plan-001",
+            data={"phase": "strategize", "state": "queued"},
+        )
+    )
+    event_queue.publish(
+        A2aEvent(
+            event_type="TaskStatusUpdateEvent",
+            plan_id="test-plan-001",
+            data={"phase": "execute", "state": "processing"},
+        )
+    )
+    event_queue.publish(
+        A2aEvent(
+            event_type="TaskStatusUpdateEvent",
+            plan_id="test-plan-001",
+            data={"phase": "apply", "state": "applied"},
+        )
+    )
 
     # Verify subscriber received all events
-    assert len(received_events) == 3, (
-        f"Expected 3 events, got {len(received_events)}"
-    )
+    assert len(received_events) == 3, f"Expected 3 events, got {len(received_events)}"
     assert received_events[0].event_type == "TaskStatusUpdateEvent"
     assert received_events[0].plan_id == "test-plan-001"
     assert received_events[0].data["phase"] == "strategize"
@@ -312,11 +314,13 @@ def _event_queue_receives_events() -> None:
     removed = event_queue.unsubscribe(sub_id)
     assert removed is True
 
-    event_queue.publish(A2aEvent(
-        event_type="TaskStatusUpdateEvent",
-        plan_id="test-plan-001",
-        data={"phase": "done"},
-    ))
+    event_queue.publish(
+        A2aEvent(
+            event_type="TaskStatusUpdateEvent",
+            plan_id="test-plan-001",
+            data={"phase": "done"},
+        )
+    )
     assert len(received_events) == 3, "Should not receive events after unsubscribe"
 
     # Verify event queue integration with A2A facade
@@ -511,9 +515,7 @@ def _guard_denylist() -> None:
 
     # Tool in allowlist should be allowed
     result5 = profile_with_allowlist.check_guard(tool_name="read_file")
-    assert result5.allowed is True, (
-        "Expected 'read_file' to be allowed (in allowlist)"
-    )
+    assert result5.allowed is True, "Expected 'read_file' to be allowed (in allowlist)"
 
     print("guard-denylist-ok")
 
@@ -565,9 +567,7 @@ def _plan_rollback_session_consistent() -> None:
     assert failed_plan.is_errored
 
     # ERRORED is terminal per spec (is_terminal returns True for ERRORED)
-    assert failed_plan.is_terminal is True, (
-        "ERRORED state should be terminal per spec"
-    )
+    assert failed_plan.is_terminal is True, "ERRORED state should be terminal per spec"
 
     # Verify session is still accessible (consistent state)
     session_still_exists = session_svc.get(session.session_id)