phase8: expand test coverage and refine docs with gitflow milestones

tests/test_ingestion_sync.py

@@ -26,6 +26,47 @@ def test_run_full_sync_creates_domain_objects(settings):
     assert PlayerSeasonStats.objects.count() >= 1
 
 
+@pytest.mark.django_db
+def test_full_sync_is_idempotent(settings):
+    settings.PROVIDER_DEFAULT_NAMESPACE = "mvp_demo"
+
+    run_sync_job(provider_namespace="mvp_demo", job_type=IngestionRun.JobType.FULL_SYNC)
+    counts_after_first = {
+        "competition": Competition.objects.count(),
+        "team": Team.objects.count(),
+        "season": Season.objects.count(),
+        "player": Player.objects.count(),
+        "player_season": PlayerSeason.objects.count(),
+        "player_stats": PlayerSeasonStats.objects.count(),
+    }
+
+    run_sync_job(provider_namespace="mvp_demo", job_type=IngestionRun.JobType.FULL_SYNC)
+    counts_after_second = {
+        "competition": Competition.objects.count(),
+        "team": Team.objects.count(),
+        "season": Season.objects.count(),
+        "player": Player.objects.count(),
+        "player_season": PlayerSeason.objects.count(),
+        "player_stats": PlayerSeasonStats.objects.count(),
+    }
+
+    assert counts_after_first == counts_after_second
+
+
+@pytest.mark.django_db
+def test_incremental_sync_runs_successfully(settings):
+    settings.PROVIDER_DEFAULT_NAMESPACE = "mvp_demo"
+
+    run = run_sync_job(
+        provider_namespace="mvp_demo",
+        job_type=IngestionRun.JobType.INCREMENTAL,
+        cursor="demo-cursor",
+    )
+
+    assert run.status == IngestionRun.RunStatus.SUCCESS
+    assert run.records_processed > 0
+
+
 @pytest.mark.django_db
 def test_run_sync_handles_rate_limit(settings):
     settings.PROVIDER_DEFAULT_NAMESPACE = "mvp_demo"