chore: filter out system heartbeats from intelligence pipeline logs

src/services/dashboard-service.ts

@@ -252,7 +252,7 @@ export class DashboardService extends BaseProcess {
       if (fs.existsSync(logPath)) {
         stats.logs = fs.readFileSync(logPath, 'utf8').trim().split('\n').map(line => {
           try { return JSON.parse(line); } catch (e) { return { message: line }; }
-        }).reverse();
+        }).filter((l: any) => l.type !== "event.system.heartbeat").reverse();
       }
     } catch (e) { }
     return stats;

src/services/logger-service.ts

@@ -57,7 +57,7 @@ export class LoggerService extends BaseProcess {
   }
 
   protected override handleEnvelope(envelope: Envelope): void {
-    if (!envelope.type.startsWith("event.")) {
+    if (!envelope.type.startsWith("event.") || envelope.type === "event.system.heartbeat") {
       return;
     }