feat: organize news packages into verified event timelines

Add optional events, evidence-backed timelines, versioned package corrections and bounded historical reprocessing. Keep independent packages readable and isolate retries by failed stage. Configure reasoning effort per model stage and refresh default news Skill drafts without publishing.

backend/tests/test_news_research.py

@@ -119,19 +119,20 @@ def test_research_stops_after_eight_tool_rounds_and_retains_failures(trading, mo
 @pytest.mark.parametrize('mode,created', [('unchanged', False), ('ordinary_wait', False), ('ordinary_due', True), ('urgent_wait', False), ('urgent_due', True), ('expired', True)])
 def test_reading_updates_only_for_changes_and_respects_aggregation(trading, monkeypatch, mode, created):
     from datetime import UTC, datetime, timedelta
-    from alphapulse.news_risk import worker
+    from alphapulse.news_risk import worker, events
     now = datetime.now(UTC)
     event = SimpleNamespace(id=1, published_revision=2, importance_stars=5 if mode.startswith('urgent') else 3,
         category='politics', tags=['政策'], result={'summary': '当前说明'}, analyzed_at=now)
-    semantic = [{'id': event.id, 'importance_stars': event.importance_stars, 'result': event.result}]
+    semantic = [{'kind': 'package', 'id': event.id, 'importance_stars': event.importance_stars, 'result': event.result}]
     fingerprint = worker.briefing.fingerprint(semantic, {}) if mode == 'unchanged' else 'previous'
     latest = SimpleNamespace(created_at=now-timedelta(seconds=30 if mode == 'urgent_wait' else 120), quotes={'fingerprint': fingerprint})
     if mode in ('ordinary_due', 'expired'): latest.quotes['dirty_since'] = (now-timedelta(minutes=16)).isoformat()
     session = AsyncMock()
     session.__aenter__.return_value = session
     session.get.return_value = SimpleNamespace(enabled=True)
-    session.scalar.side_effect = [latest, None]
+    session.scalar.side_effect = [latest, None, None]
     session.scalars.return_value = SimpleNamespace(all=lambda: [] if mode == 'expired' else [event])
+    monkeypatch.setattr(events, 'reading_inputs', AsyncMock(return_value=[] if mode == 'expired' else [{'kind': 'package', 'id': event.id, 'revision': event.published_revision, 'importance_stars': event.importance_stars, 'category': event.category, 'tags': event.tags, 'result': event.result}]))
     added = []
     session.add = added.append
     monkeypatch.setattr(worker, 'SessionLocal', lambda: session)
@@ -199,9 +200,11 @@ def test_reposts_do_not_trigger_advanced_calls_but_review_changes_do(trading, mo
     if change == 'fact': updated[0]['result']['facts'] = '官方修订说明'
     assert (briefing.semantic_packages(updated) != semantic) is expected
     session = AsyncMock(); session.__aenter__.return_value = session
-    session.get.return_value = SimpleNamespace(enabled=True); session.scalar.side_effect = [latest, None]
+    session.get.return_value = SimpleNamespace(enabled=True); session.scalar.side_effect = [latest, None, None]
     session.scalars.return_value = SimpleNamespace(all=lambda: [SimpleNamespace(id=1, published_revision=2,
         importance_stars=5, category='politics', tags=[], result=updated[0]['result'], analyzed_at=now)])
+    from alphapulse.news_risk import events
+    monkeypatch.setattr(events, 'reading_inputs', AsyncMock(return_value=[{**p, 'kind': 'package', 'category': 'politics', 'tags': []} for p in updated]))
     session.add = lambda value: None
     generated = AsyncMock(return_value={'reading': [], 'synthesis': None, 'usage': []})
     monkeypatch.setattr(worker, 'SessionLocal', lambda: session)