feat: Vuln debug logs

server/internal/services/findings.go

@@ -207,8 +207,11 @@ func MarkInstanceForRescan(instanceID string) (int64, error) {
 		bson.M{"$set": bson.M{"scan_pending": true}},
 	)
 	if err != nil {
+		log.Printf("vulnsched: mark rescan for instance %s: %v", instanceID, err)
 		return 0, err
 	}
+	log.Printf("vulnsched: rescan requested for instance %s, %d of %d server(s) flagged",
+		instanceID, res.ModifiedCount, res.MatchedCount)
 	return res.ModifiedCount, nil
 }