Test durable tenant-scoped generation attempt history

tests/test_generation_foundation.py

@@ -313,6 +313,36 @@ async def test_generation_request_idempotency_and_cancel(generation_container) -
     assert retrieved.status is GenerationJobStatus.CANCELLED
 
 
+@pytest.mark.asyncio
+async def test_generation_attempt_history_is_durable_and_workspace_scoped(
+    generation_container,
+) -> None:
+    context = await create_context(generation_container, "Generation attempt history")
+    request = await generation_container.generation.create(
+        workspace_id=context.workspace_id,
+        user_id=context.user_id,
+        payload=request_payload(),
+        idempotency_key="generation-attempt-history",
+    )
+    claimed = await generation_container.generation.claim_dispatchable_jobs(limit=1)
+    assert len(claimed) == 1
+    assert claimed[0].generation_job_id == request.job.id
+
+    attempts = await generation_container.generation.list_job_attempts(
+        context.workspace_id, context.user_id, request.job.id
+    )
+    assert len(attempts) == 1
+    assert attempts[0].attempt_number == 1
+    assert attempts[0].status == "submitting"
+    assert attempts[0].generation_job_id == request.job.id
+
+    other_context = await create_context(generation_container, "Other workspace")
+    with pytest.raises(GenerationJobNotFoundError):
+        await generation_container.generation.list_job_attempts(
+            other_context.workspace_id, other_context.user_id, request.job.id
+        )
+
+
 @pytest.mark.asyncio
 async def test_generation_records_are_workspace_isolated(generation_container) -> None:
     context_a = await create_context(generation_container, "Generation A")