Adding tutorial

Author: vladbagmet

docs/modules/ROOT/examples/api/tutorial008.py

@@ -0,0 +1,7 @@
+from corva import Api, Cache, ScheduledDataTimeEvent, ScheduledDepthEvent, scheduled
+
+
+@scheduled
+def scheduled_app(event: ScheduledDataTimeEvent, api: Api, cache: Cache):
+    api.max_retries = 5  # Enabling up to 5 retries when HTTP error happens.
+    ...