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>

packages/shared-types/src/index.ts

@@ -1191,6 +1191,9 @@ export interface MonitoringCitationRankingItem {
   sample_status: string;
   cited_answer_count: number;
   cited_article_count: number;
+  citation_source_count: number;
+  saas_source_count: number;
+  saas_source_rate: number | null;
   citation_rate: number | null;
 }
 
@@ -1200,6 +1203,13 @@ export interface MonitoringCitedArticle {
   publish_platform: string;
   citation_count: number;
   citation_rate: number | null;
+  source_share: number | null;
+}
+
+export interface MonitoringDashboardCitationWindow {
+  days: number;
+  from: string;
+  to: string;
 }
 
 export type MonitoringPlatformAuthorizationStatus =
@@ -1217,12 +1227,19 @@ export interface MonitoringDashboardRuntime {
 export interface MonitoringDashboardCompositeResponse {
   overview: MonitoringOverview;
   runtime: MonitoringDashboardRuntime;
+  citation_window: MonitoringDashboardCitationWindow;
   platform_breakdown: MonitoringPlatformBreakdownItem[];
   hot_questions: MonitoringHotQuestion[];
   citation_ranking: MonitoringCitationRankingItem[];
   cited_articles: MonitoringCitedArticle[];
 }
 
+export interface MonitoringCitationSummaryResponse {
+  citation_window: MonitoringDashboardCitationWindow;
+  citation_ranking: MonitoringCitationRankingItem[];
+  cited_articles: MonitoringCitedArticle[];
+}
+
 export interface MonitoringQuestionDetailCitation {
   cited_url: string;
   cited_title: string | null;