feat: catalog Record dict conversion

tests/test_catalog.py

@@ -69,3 +69,26 @@ def test_empty_id_raises():
 def test_negative_duration_raises():
     with pytest.raises(CatalogError):
         validate(make_record(duration_s=-1))
+
+
+from hef.catalog import record_to_dict, record_from_dict
+
+
+def test_dict_round_trip():
+    record = make_record()
+    restored = record_from_dict(record_to_dict(record))
+    assert restored == record
+
+
+def test_record_from_dict_rejects_unknown_field():
+    data = record_to_dict(make_record())
+    data["bogus"] = 1
+    with pytest.raises(CatalogError):
+        record_from_dict(data)
+
+
+def test_record_from_dict_rejects_missing_required_field():
+    data = record_to_dict(make_record())
+    del data["title"]
+    with pytest.raises(CatalogError):
+        record_from_dict(data)