[collector] ensure model manager retrieves newest Teil first

closes: #7

collector/models.py

@@ -16,6 +16,7 @@ class Teil(models.Model):
 
         verbose_name = "Teil"
         verbose_name_plural = "Teile"
+        ordering = ["-modified"]
 
     def __str__(self) -> str:
         modified = self.modified.isoformat(timespec="seconds")

collector/tests.py

@@ -90,3 +90,15 @@ def test_enter_endpoints_emits_expected_logs(
                 for le in logs
             )
         )
+
+
+def test_model_manager_lists_newest_teil_first():
+    t1 = Teil.objects.create(name="Teil 1")
+    t2 = Teil.objects.create(name="Teil 2")
+    t3 = Teil.objects.create(name="Teil 3")
+
+    assert t1.modified < t2.modified < t3.modified
+
+    all_teile = Teil.objects.all()
+
+    assert all_teile[2].modified < all_teile[1].modified < all_teile[0].modified