feat: surface STATUS_PENDING and STATUS_PROCESSING on Export

Export only had STATUS_COMPLETED even though the status property
documents three valid values. Add is_pending/is_processing/is_completed
predicate properties so callers can check all three states without
string literals.

Author: Fivell

src/didww/resources/export.py

@@ -17,6 +17,18 @@ class Export(DidwwApiModel):
     class Meta:
         type = "exports"
 
+    @property
+    def is_pending(self):
+        return self.status == ExportStatus.PENDING
+
+    @property
+    def is_processing(self):
+        return self.status == ExportStatus.PROCESSING
+
+    @property
+    def is_completed(self):
+        return self.status == ExportStatus.COMPLETED
+
 
 class ExportRepository(Repository):
     _resource_class = Export

tests/resources/test_export.py

@@ -5,6 +5,29 @@
 from didww.resources.export import Export
 
 
+class TestExportStatusHelpers:
+    def test_is_pending(self):
+        export = Export()
+        export.status = ExportStatus.PENDING
+        assert export.is_pending is True
+        assert export.is_processing is False
+        assert export.is_completed is False
+
+    def test_is_processing(self):
+        export = Export()
+        export.status = ExportStatus.PROCESSING
+        assert export.is_processing is True
+        assert export.is_pending is False
+        assert export.is_completed is False
+
+    def test_is_completed(self):
+        export = Export()
+        export.status = ExportStatus.COMPLETED
+        assert export.is_completed is True
+        assert export.is_pending is False
+        assert export.is_processing is False
+
+
 class TestExport:
     @my_vcr.use_cassette("exports/list.yaml")
     def test_list_exports(self, client):