Analytics: Verdichtung, Statistik, Heatmap-Daten

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

analytics/src/db.js

@@ -44,6 +44,12 @@ CREATE TABLE IF NOT EXISTS daily (
   count INTEGER NOT NULL DEFAULT 0,
   PRIMARY KEY (site, day, dim, key)
 );
+-- Merker für die Nachtverdichtung: Tage, die schon in daily stehen (macht runNightly idempotent).
+CREATE TABLE IF NOT EXISTS agg_state (
+  site TEXT NOT NULL,
+  day TEXT NOT NULL,
+  PRIMARY KEY (site, day)
+);
 `;
 
 export function openDb(path) {