Finalize GTL and retire S/R research harness

frontend/src/api/admin.ts

@@ -200,8 +200,11 @@ export interface TriggerJobResponse {
   job: string;
   status: 'triggered' | 'busy' | 'blocked' | 'not_found';
   message: string;
+  target_model?: BacktestTargetModel;
 }
 
+export type BacktestTargetModel = 'production_gtl' | 'structural_sr';
+
 export function listJobs() {
   return apiClient.get<JobStatus[]>('admin/jobs').then((r) => r.data);
 }
@@ -216,9 +219,9 @@ export function toggleJob(jobName: string, enabled: boolean) {
     .then((r) => r.data);
 }
 
-export function triggerJob(jobName: string) {
+export function triggerJob(jobName: string, options?: { target_model?: BacktestTargetModel }) {
   return apiClient
-    .post<TriggerJobResponse>(`admin/jobs/${jobName}/trigger`)
+    .post<TriggerJobResponse>(`admin/jobs/${jobName}/trigger`, options)
     .then((r) => r.data);
 }