OpenSearch dynamically maps string fields as text with a .keyword subfield. Sorting on text fields throws an error; only .keyword, date, and numeric fields support sorting. Add .keyword suffix to all string sort columns (status, routeId, agentId, executionId, correlationId, applicationName) while keeping start_time and duration_ms as-is. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>