Fix review queue pagination and API fallback handling

apps/api/tests/test_api.py

@@ -57,6 +57,32 @@ def test_invalid_period_is_rejected() -> None:
     assert client.get("/api/v1/activity?sort=unknown").status_code == 422
 
 
+def test_review_queue_filters_before_pagination() -> None:
+    with Session(engine) as db:
+        stage_observations(db, [{
+            "source_system": "rf4map", "source_external_id": f"queue-{i}",
+            "source_url": f"https://rf4map.ru/points/queue-{i}",
+            "fish": "Queue fish", "waterbody": "Queue water",
+        } for i in range(3)])
+        rows = list(db.scalars(select(ExternalObservation).where(ExternalObservation.source_system == "rf4map")))
+        for i, row in enumerate(rows):
+            row.status = "published" if i == 0 else "ready"
+            row.last_seen_at = datetime.now(timezone.utc) - timedelta(minutes=i)
+        db.commit()
+        try:
+            headers = {"Authorization": "Bearer change-me-in-production"}
+            url = "/api/v1/admin/external-observations?status=review&source_system=rf4map&limit=1"
+            first = client.get(url, headers=headers).json()
+            second = client.get(url + "&offset=1", headers=headers).json()
+            assert len(first) == len(second) == 1
+            assert first[0]["status"] == second[0]["status"] == "ready"
+            assert first[0]["id"] != second[0]["id"]
+        finally:
+            for row in rows:
+                db.delete(row)
+            db.commit()
+
+
 def test_timeline_includes_more_than_catch_page_and_sitemap_includes_old_spots() -> None:
     with Session(engine) as db:
         fish = db.scalar(select(Fish).where(Fish.slug == "pike"))