Change to 60m

Initial attempt at solving #62.

Currently setting to 30m, can adjust if needed.

Reviewed-on: #63

scl.py

@@ -336,8 +336,8 @@ with Session(engine) as session:
                 )
                 / 60
             )
-            # Only post if estimated restoration time has changed by 30m or more
-            if est_restoration_diff_mins >= 30:
+            # Only post if estimated restoration time has changed by 60m or more
+            if est_restoration_diff_mins >= 60:
                 existing_record.estimated_restoration_time = estimated_restoration_time
                 if estimated_restoration_time > datetime.now():
                     # New estimated restoration time is in the future, so likely to be a real time