feat(monitoring): match citations by canonical link and scope summary by brand/keyword/platform/date

Replace the domain+title fuzzy alias scoring with a canonical
candidate-key index built from published-link aliases — only exact
matches now resolve to a SaaS source, eliminating false positives
across articles sharing a host (e.g. m.163.com vs www.163.com).

Surface the summary scoping that already existed on loadCitationRanking
/ loadCitedArticles by accepting brand_id, keyword_id, ai_platform_id
and business_date on CitationSummary, plumbing them through the handler
and admin tracking view.

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

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

@@ -432,7 +432,7 @@ const enUS = {
     backToQuestions: "Back to questions",
     citationRanking: "Citation Ranking",
     citationRankingTitle: "Citation Ranking",
-    citationRankingHint: "Attribute SaaS-published content by registrable domain across model citation sources.",
+    citationRankingHint: "Attribute SaaS-published content by published-link identity across model citation sources.",
     citationWindow7: "Last 7 days",
     citationWindow30: "Last 30 days",
     citationWindowLabel: "Last {days} days",