feat: add monitoring marked articles and retention updates

server/migrations_ops/20260617134500_document_external_article_retention_job.down.sql

@@ -0,0 +1,6 @@
+UPDATE ops.scheduler_jobs
+SET display_name = '监控历史保留清理',
+    description = '按保留窗口和索引限批删除最近 30 天以前的监控历史数据。',
+    config = config - 'external_article_mark_retention' - 'clears_manual_mark_attribution',
+    updated_at = NOW()
+WHERE job_key = 'monitoring_retention_cleanup';

server/migrations_ops/20260617134500_document_external_article_retention_job.up.sql

@@ -0,0 +1,6 @@
+UPDATE ops.scheduler_jobs
+SET display_name = '监控历史与外部文章标记清理',
+    description = '按保留窗口和索引限批删除监控历史；外部文章标记到期 6 个月后删除，并同步清理引用事实归因。',
+    config = config || '{"external_article_mark_retention":"6 months","clears_manual_mark_attribution":true}'::jsonb,
+    updated_at = NOW()
+WHERE job_key = 'monitoring_retention_cleanup';