refactor(news): remove retired research workflow

backend/alembic/env.py

@@ -24,8 +24,9 @@ target_metadata = Base.metadata
 
 
 def include_object(obj, name, type_, reflected, compare_to):
-    # klines 的分区表由迁移手工创建，不在模型里；不过滤的话 autogenerate 会生成 drop_table
-    return not (type_ == "table" and reflected and compare_to is None and name.startswith("klines_"))
+    # 分区表与退役新闻表不在运行模型中；自动生成迁移不能删除保留的历史表。
+    archived = name.startswith(('klines_', 'news_ai_', 'risk_')) or name == 'news_package_evidence'
+    return not (type_ == "table" and reflected and compare_to is None and archived)
 
 # other values from the config, defined by the needs of env.py,
 # can be acquired: