feat: add workflow dry-run observability

ops/src/api/admin.ts

@@ -306,6 +306,52 @@ export type OrchestratorShadowRunList = {
   runs: OrchestratorShadowRun[];
 };
 
+export type OrchestratorExecutionPlan = {
+  eventId: string;
+  runId: string;
+  requestId: string;
+  userId: string;
+  sessionId: string | null;
+  nativeStatus: string;
+  nativeAttempts: number;
+  mode: string | null;
+  candidateEngine: string;
+  effectiveEngine: string;
+  fallbackEngine: string;
+  reason: string | null;
+  candidateReason: string | null;
+  configVersion: number | null;
+  bucket: number | null;
+  taskType: string | null;
+  dryRun: boolean;
+  handoffAllowed: boolean;
+  plannedAt: number;
+  nativeCompletedAt: number | null;
+};
+
+export type OrchestratorExecutionPlanMetrics = {
+  decisions: number;
+  candidateSelections: number;
+  candidateSelectionRate: number | null;
+  nativeSelections: number;
+  nativeSucceeded: number;
+  nativeFailed: number;
+  nativeSettledRate: number | null;
+  handoffAllowed: number;
+  distinctSessions: number;
+  lastPlannedAt: number | null;
+  candidateReasons: Array<{ value: string; count: number }>;
+  taskTypes: Array<{ value: string; count: number }>;
+  sampled: boolean;
+};
+
+export type OrchestratorExecutionPlanList = {
+  generatedAt: number;
+  window: { hours: number; from: number };
+  metrics: OrchestratorExecutionPlanMetrics;
+  plans: OrchestratorExecutionPlan[];
+};
+
 export type OrchestratorCanaryReadinessCheck = {
   id: string;
   passed: boolean;
@@ -443,6 +489,20 @@ export async function fetchOrchestratorShadowRuns(params: {
   );
 }
 
+export async function fetchOrchestratorExecutionPlans(params: {
+  hours?: number;
+  limit?: number;
+  selection?: 'all' | 'candidate' | 'native';
+} = {}) {
+  const query = new URLSearchParams();
+  if (params.hours) query.set('hours', String(params.hours));
+  if (params.limit) query.set('limit', String(params.limit));
+  if (params.selection) query.set('selection', params.selection);
+  return adminFetch<OrchestratorExecutionPlanList>(
+    `/admin-api/orchestrator/execution-plans?${query}`,
+  );
+}
+
 export async function fetchOrchestratorCanaryReadiness() {
   return adminFetch<OrchestratorCanaryReadiness>(
     '/admin-api/orchestrator/canary-readiness',