dita_v2: fix arithmetic in test_asex_account mixed-ops funding expectation (2x50x0.5=50, not 100)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

prod/clean_arch/dita_v2/test_asex_account.py

@@ -115,7 +115,8 @@ class TestASExConcurrency:
             for f in as_completed([ex.submit(_f, i) for i in [0,1]] + [ex.submit(_fu, i) for i in [0,1]]):
                 f.result(timeout=60)
         assert p._backend._proj._k_realized == pytest.approx(200.0)
-        assert p._backend._proj._k_funding == pytest.approx(100.0)
+        # 2 workers x 50 calls x 0.5 = 50.0; exact total proves zero lost updates
+        assert p._backend._proj._k_funding == pytest.approx(50.0)
         p.close(); _clean()