Verify that WorkflowAdapter provides visibility into terminated workflows in the poimen-harness namespace. This ensures namespace pass-down feature is working correctly and users can specify different domains/namespaces via X-Service: workflow requests. Tests added: 1. integration-test.sh: Added workflow visibility tests - List workflows in poimen-harness namespace - Verify terminated/completed workflows are visible - Validate namespace parameter requirement - Check auth enforcement 2. workflow-visibility-test.sh: NEW dedicated workflow test script - Tests WorkflowAdapter namespace pass-down - Verifies list, describe, and auth enforcement - Specific focus on poimen-harness namespace - Looks for 4 terminated workflows 3. task-workflow-visibility.yaml: NEW Tekton task - Runs workflow visibility tests against live gateway - Sidecar deployment pattern - Publishes result + summary + workflow-count metrics 4. pipeline-sse-optimization.yaml: Updated - Added workflow-visibility-tests stage (runs after integration-tests) - Updated report-results to include workflow test results - Full pipeline now: integration → workflow-visibility → load → report 5. kustomization.yaml: Updated - Added task-workflow-visibility.yaml - Added workflow-visibility-test-script ConfigMap This ensures that the deprecated /workflows endpoint replacement correctly supports multi-tenant access via namespace specification in request payload.