feat(backup): code_shape_uses travels (v9); consumer-map test expects uses (#2870)

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

tests/test_services_backup.py

@@ -18,7 +18,7 @@ def test_backup_version_is_v8():
     point of the test — a payload section added without moving the version
     produces backups that are structurally different and indistinguishable
     by inspection."""
-    assert backup.BACKUP_VERSION == 8
+    assert backup.BACKUP_VERSION == 9
 
 
 def test_not_included_lists_the_known_gaps():
@@ -115,7 +115,8 @@ async def test_export_full_backup_contains_every_declared_section():
                 "topic_suppressions",
                 "systems", "record_systems", "design_systems",
                 "design_tokens", "note_usage_events", "repo_bindings",
-                "note_supersessions", "code_shapes", "code_shape_events"):
+                "note_supersessions", "code_shapes", "code_shape_events",
+                "code_shape_uses"):
         assert key in out, f"missing export section: {key}"
         assert out[key] == []