Add application_name filter to OpenSearch query builder — sidebar app selection now correctly filters the exchange list. The application field was being resolved to agentIds in the controller but never applied as a query filter in OpenSearch. Also restore snake_case sort column mapping since the OpenSearch toMap() serializer uses snake_case field names (start_time, route_id, etc.), not camelCase. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>