fix: set account_id on session_supporting_data, session_resolution_outputs, maintenance_schedules, psa_post_log constructors

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/app/api/endpoints/maintenance_schedules.py

@@ -69,6 +69,7 @@ async def create_schedule(
 
     schedule = MaintenanceSchedule(
         tree_id=data.tree_id,
+        account_id=current_user.account_id,
         created_by=current_user.id,
         cron_expression=data.cron_expression,
         timezone=data.timezone,