feat(monitoring): attribute SaaS citations by registrable domain

Persist host/registrable_domain/site_key on monitoring article URL
aliases, populate them on desktop-publish completion, and use them in
the citation pipeline to count how often SaaS-published content
appears as a citation source. Expose a /citation-summary endpoint with
a 7/30-day window switch and surface the new source-share metrics in
the tracking dashboard.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/admin-web/src/i18n/messages/en-US.ts

@@ -432,7 +432,10 @@ const enUS = {
     backToQuestions: "Back to questions",
     citationRanking: "Citation Ranking",
     citationRankingTitle: "Citation Ranking",
-    citationRankingHint: "Track how often content published from this system appears across model answers.",
+    citationRankingHint: "Attribute SaaS-published content by registrable domain across model citation sources.",
+    citationWindow7: "Last 7 days",
+    citationWindow30: "Last 30 days",
+    citationWindowLabel: "Last {days} days",
     citedArticles: "Cited Articles",
     citedArticlesTitle: "Cited Articles",
     answerContent: "Answer Content",
@@ -492,6 +495,7 @@ const enUS = {
       citedAnswers: "Cited Answers",
       citedArticles: "Cited Articles",
       citationRate: "Citation Rate",
+      saasSourceRate: "Source Share",
       citations: "Citations",
       sourcePlatform: "Source",
       channelName: "Channel",

apps/admin-web/src/i18n/messages/zh-CN.ts

@@ -433,7 +433,10 @@ const zhCN = {
     backToQuestions: "返回问题列表",
     citationRanking: "Citation Ranking",
     citationRankingTitle: "引用排行",
-    citationRankingHint: "统计系统发布内容在各模型回答中出现的次数与覆盖率。",
+    citationRankingHint: "按主体域名归因 SaaS 发文在模型引用来源中的出现次数与占比。",
+    citationWindow7: "近 7 天",
+    citationWindow30: "近 30 天",
+    citationWindowLabel: "近 {days} 天",
     citedArticles: "Cited Articles",
     citedArticlesTitle: "被引用文章",
     answerContent: "答案内容",
@@ -493,6 +496,7 @@ const zhCN = {
       citedAnswers: "引用回答数",
       citedArticles: "引用文章数",
       citationRate: "引用率",
+      saasSourceRate: "来源占比",
       citations: "引用次数",
       sourcePlatform: "来源平台",
       channelName: "渠道名称",