fix: reconcile caller aggregates and strengthen evidence handling

apps/worker-cdr/src/analytics-main.ts

@@ -54,7 +54,7 @@ async function entries(entries: Array<[string, string[]]>) {
     const event = JSON.parse(fields[1]) as AnalyticsEvent;
     await store.consume(event);
     await redis.xack(ANALYTICS_STREAM, ANALYTICS_GROUP, id);
-    dataThrough = new Date(event.at).toISOString();
+    if (!dataThrough || event.at > Date.parse(dataThrough)) dataThrough = new Date(event.at).toISOString();
   }
 }
 async function observeActive() {
@@ -92,7 +92,7 @@ async function main() {
       if (Date.now() - lastAlerts > 15000 && !degraded) { await evaluateCallerAlerts(db); lastAlerts = Date.now(); }
     } catch (e) { degraded = true; reason = e instanceof Error ? e.message.slice(0, 200) : 'Worker error'; logger.error({ reason }, 'Analytics cycle failed'); }
     try {
-      const payload = JSON.stringify({ degraded, reason, dataThrough, lagMs: degraded ? null : 0, captureSince: process.env.ANALYTICS_CAPTURE_SINCE ?? null, spoolOffset: cursor.offset, gap, updatedAt: new Date().toISOString() });
+      const payload = JSON.stringify({ degraded, reason, dataThrough, lagMs: null, coverageStatus: 'OBSERVATIONS_ONLY', captureSince: process.env.ANALYTICS_CAPTURE_SINCE ?? null, spoolOffset: cursor.offset, gap, updatedAt: new Date().toISOString() });
       await db.$executeRaw(Prisma.sql`INSERT INTO caller_analysis_health(id,payload,updated_at) VALUES ('worker',${payload},NOW(3)) ON DUPLICATE KEY UPDATE payload=VALUES(payload),updated_at=VALUES(updated_at)`);
     } catch { logger.error('Analytics heartbeat write failed'); }
     await new Promise(resolve => setTimeout(resolve, 700));