Shorten logging of timeseries updatesd (openhab#4728)

Signed-off-by: Kai Kreuzer <kai@openhab.org>

Author: kaikreuzer

bundles/org.openhab.core/src/main/java/org/openhab/core/items/events/ItemTimeSeriesEvent.java

@@ -60,6 +60,6 @@ public TimeSeries getTimeSeries() {
 
     @Override
     public String toString() {
-        return String.format("Item '%s' shall process timeseries %s", itemName, timeSeries.getStates().toList());
+        return String.format("Item '%s' shall process timeseries with %d values.", itemName, timeSeries.size());
     }
 }

bundles/org.openhab.core/src/main/java/org/openhab/core/items/events/ItemTimeSeriesUpdatedEvent.java

@@ -60,6 +60,6 @@ public TimeSeries getTimeSeries() {
 
     @Override
     public String toString() {
-        return String.format("Item '%s' updated timeseries %s", itemName, timeSeries.getStates().toList());
+        return String.format("Item '%s' updated timeseries with %d values.", itemName, timeSeries.size());
     }
 }