sync update from LAN repo (source master @ ca48c4ec)

offline-backend-20260512/backend/tests/test_migration_graph.py

@@ -14,7 +14,21 @@ def test_migration_graph_has_unique_revisions_and_one_head() -> None:
 
     revisions = list(scripts.walk_revisions())
     assert len({revision.revision for revision in revisions}) == len(revisions)
-    assert scripts.get_heads() == ["20261020_01"]
+    assert scripts.get_heads() == ["20261102_02"]
+    assert scripts.get_revision("20261026_02").down_revision == ("20261026_01", "20261022_01")
+    assert scripts.get_revision("20261026_01").down_revision == "20261025_03"
+    assert scripts.get_revision("20261023_03").down_revision == "20261023_02"
+    assert scripts.get_revision("20261023_02").down_revision == (
+        "20261024_02",
+        "20261022_02",
+    )
+    assert scripts.get_revision("20261024_02").down_revision == "20261024_01"
+    assert scripts.get_revision("20261022_02").down_revision == "20261024_01"
+    assert scripts.get_revision("20261024_01").down_revision == "20261023_01"
+    assert scripts.get_revision("20261023_01").down_revision == "20261022_03"
+    assert scripts.get_revision("20261022_03").down_revision == "20261021_01"
+    assert scripts.get_revision("20261022_01").down_revision == "20261014_02"
+    assert scripts.get_revision("20261021_01").down_revision == "20261020_01"
     assert scripts.get_revision("20261020_01").down_revision == (
         "20261019_01",
         "20261014_02",