feat(host-agent): make execution history authoritative

apps/device-host-agent/tests/test_assignment.py

@@ -25,6 +25,7 @@ def _assignment(**overrides) -> AssignmentModel:
 
 def test_goal_assignment_executes_through_task_runner() -> None:
     received: list[Task] = []
+    created: list[tuple[str, str | None, int | None]] = []
 
     class FakeTaskRunner:
         def run(self, task: Task) -> Task:
@@ -32,10 +33,21 @@ def test_goal_assignment_executes_through_task_runner() -> None:
             task.status = "completed"
             return task
 
+    class FakeMetadataStore:
+        def create_task(
+            self,
+            task: Task,
+            *,
+            source_task_id: str | None = None,
+            source_attempt: int | None = None,
+        ) -> None:
+            created.append((task.id, source_task_id, source_attempt))
+
     factories = ExecutionFactories(
         task_runner_factory=lambda: FakeTaskRunner(),  # type: ignore[arg-type,return-value]
         workflow_runner_factory=lambda: object(),  # type: ignore[arg-type,return-value]
         workflow_store=object(),  # type: ignore[arg-type]
+        metadata_store=FakeMetadataStore(),  # type: ignore[arg-type]
     )
 
     result = AssignmentExecutor(factories).execute(_assignment())
@@ -44,6 +56,7 @@ def test_goal_assignment_executes_through_task_runner() -> None:
     assert received[0].goal == "open settings"
     assert received[0].device_id == "device-a"
     assert result.metadata["runtime_task_id"] == received[0].id
+    assert created == [(received[0].id, "cloud-task", 1)]
 
 
 def test_goal_assignment_preserves_runtime_failure_reason() -> None: