Snapshot: new training tasks (balanced generation), docs

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

tasks_gen/train/G1922/seed/i_lift_usage.ddls.asddls

@@ -0,0 +1,16 @@
+@AccessControl.authorizationCheck: #NOT_REQUIRED
+@EndUserText.label: 'Lift usage'
+define view entity {{P}}I_LIFT_USAGE
+  as select from {{p}}lift as l
+    inner join {{p}}lift_op as o on  o.lift_id = l.lift_id
+                                 and o.run_mode <> 'TEST'
+{
+  key l.lift_id         as lift_id,
+  key o.run_mode        as run_mode,
+      l.building_id     as building_id,
+      sum( o.run_hours ) as hours,
+      count( * )         as run_count,
+      max( o.run_date )  as last_run,
+      sum( o.trips )     as value
+}
+group by l.lift_id, o.run_mode, l.building_id