fix return-value/deprecated API bugs, accumulation lock leaks, code cleanup

- raise instead of silent None for unsupported operands and empty negation
- validate before acquiring lock in Accumulation operators (no RLock leak)
- Accumulation._copy_provenance helper, ADC_Result._copy_metadata for all result paths
- shared _sandbox_stdout_redirect contextmanager for sandboxed scripts
- TemperatureMonitor dead code removal (gtk helper, traceback, unused properties)
- new unit tests incl. lock-freedom regression test
- gitignore sphinx generated doc/_autosummary/ and doc/damaris/

tests/test_Config_Result.py

@@ -0,0 +1,29 @@
+import unittest
+
+from damaris.data.Config_Result import Config_Result
+
+
+class TestConfigResult(unittest.TestCase):
+    def test_constructor_with_no_arguments(self):
+        """Test initializer with no arguments."""
+        cr = Config_Result()
+        self.assertEqual(cr.get_config_dictionary(), {})
+        self.assertEqual(cr.description, {})
+
+    def test_constructor_with_arguments(self):
+        """Test initializer with config and description arguments."""
+        config = {"a": 1}
+        desc = {"b": 2}
+        cr = Config_Result(config=config, desc=desc)
+        self.assertEqual(cr.get_config_dictionary(), config)
+        self.assertEqual(cr.description, desc)
+
+    def test_get_set_config(self):
+        cr = Config_Result()
+        cr.set_config("key", "value")
+        self.assertEqual(cr.get_config("key"), "value")
+        self.assertIsNone(cr.get_config("missing"))
+
+
+if __name__ == "__main__":
+    unittest.main()