fix(aci milestone 3): make dual processing logs more informative (#89343)

Allow filtering for non-empty results + add aggregation value to logs

Author: mifu67

src/sentry/incidents/subscription_processor.py

@@ -436,7 +436,11 @@ def process_update(self, subscription_update: QuerySubscriptionUpdate) -> None:
                 logger.info(
                     "dual processing results for alert rule %s",
                     self.alert_rule.id,
-                    extra={"results": results},
+                    extra={
+                        "results": results,
+                        "num_results": len(results),
+                        "value": aggregation_value,
+                    },
                 )
 
         has_anomaly_detection = features.has(