Simplify the upload state and the story page data

The pause of the user and a missing ingest folder are separate checks.
One function gives the upload state to the settings and the story page.
A route that returns only a story no longer loads its chapters or asks
CWA for its book. The story page data loses the values that no page reads.

tests/test_api_flows.py

@@ -187,3 +187,15 @@ def test_chapter_requests_without_ids_name_what_to_select(client, story):
     for body in ({}, {"chapter_ids": None}):
         response = client.post(f"/api/stories/{sid}/chapters/delete", json=body, headers=H)
         assert (response.status_code, response.json["error"]) == (400, "Select the chapters to delete")
+
+
+def test_a_story_change_does_not_ask_cwa_for_the_book(client, story, monkeypatch):
+    sid, _ = story
+    o.store.update_story(sid, calibre_id=7, calibre_uuid="book-7")
+    monkeypatch.setattr(config, "CWA_URL", "https://cwa.example")
+    cwa = Mock()
+    monkeypatch.setattr(o, "cwa", lambda: cwa)
+    response = client.put(f"/api/stories/{sid}/settings", json={"recheck_days": 4}, headers=H)
+    assert response.json["recheck_days"] == 4
+    assert "chapters" not in response.json
+    cwa.get_book.assert_not_called()