fix: correct all async route status code assertions (POST=202, GET poll=200)

tests/integration/test_analyze_integration.py

@@ -250,7 +250,7 @@ def test_async_job_submission_returns_job_id(mock_pipeline, fake_repo):
             json={"github_url": VALID_URL},
         )
 
-    assert response.status_code == 200
+    assert response.status_code == 202
     data = response.json()
     assert "job_id" in data
     assert isinstance(data["job_id"], str)
@@ -374,7 +374,7 @@ def test_async_job_full_poll_cycle_with_eager_execution(mock_pipeline, fake_repo
             json={"github_url": VALID_URL},
         )
 
-    assert submit_resp.status_code == 200
+    assert submit_resp.status_code == 202
     job_id = submit_resp.json().get("job_id")
     assert job_id, "Expected a job_id in the async submit response"