Added default logging rotation config (#8974)

no issue

- define `period` and `count` in our defaults.json config
- advantage: easier access and better overview how logging is configured by default
- period is 1d and count is 10

core/server/config/defaults.json

@@ -18,7 +18,9 @@
     "logging": {
         "level": "info",
         "rotation": {
-            "enabled": false
+            "enabled": false,
+            "period": "1d",
+            "count": 10
         },
         "transports": ["stdout"]
     },