script for release added, pyrefly checks are fixed for now

tests/test_Accumulation.py

@@ -360,6 +360,20 @@ class TestAccumulation(unittest.TestCase):
         r *= 2
         np.testing.assert_array_equal(accu.y[0], np.array([10, 20, 30], dtype="float32"))
 
+    def test_empty_iadd_accumulation_without_common_descriptions(self):
+        """An accumulation without common descriptions can be copied in-place."""
+        other = Accumulation(x=np.array([0.0, 1.0]),
+                             y=[np.array([10.0, 20.0])],
+                             n=1,
+                             index=[(0, 1)],
+                             sampl_freq=1000.0)
+        accu = Accumulation()
+
+        accu += other
+
+        self.assertIsNone(accu.common_descriptions)
+        np.testing.assert_array_equal(accu.y[0], other.y[0])
+
     def test_accumulation_plus_accumulation_keeps_both_job_ids(self):
         """accu1 + accu2 must keep the provenance of both operands."""
         adc1 = self.create_adc_result()