feat: add workflow dry-run observability

admin-routes.test.mjs

@@ -139,6 +139,17 @@ test('admin orchestrator routes expose a versioned plug-in control plane', async
       },
     },
     orchestratorObservabilityService: {
+      async listExecutionPlans(options) {
+        assert.deepEqual(options, {
+          hours: '24',
+          limit: '50',
+          selection: 'candidate',
+        });
+        return {
+          metrics: { decisions: 3, candidateSelections: 2 },
+          plans: [{ runId: 'run-plan-1', candidateEngine: 'langgraph' }],
+        };
+      },
       async getCanaryReadiness() {
         return {
           ready: false,
@@ -206,6 +217,15 @@ test('admin orchestrator routes expose a versioned plug-in control plane', async
     assert.equal(shadowRunsResponse.status, 200);
     assert.equal((await shadowRunsResponse.json()).metrics.failures, 1);
 
+    const executionPlansResponse = await fetch(
+      `${server.baseUrl}/admin-api/orchestrator/execution-plans?hours=24&limit=50&selection=candidate`,
+      { headers: { cookie: 'h5_user_session=token-admin' } },
+    );
+    assert.equal(executionPlansResponse.status, 200);
+    const executionPlansBody = await executionPlansResponse.json();
+    assert.equal(executionPlansBody.metrics.decisions, 3);
+    assert.equal(executionPlansBody.plans[0].candidateEngine, 'langgraph');
+
     const readinessResponse = await fetch(
       `${server.baseUrl}/admin-api/orchestrator/canary-readiness`,
       { headers: { cookie: 'h5_user_session=token-admin' } },