feat(scenarios): show last run status and timestamp on scenarios list

- extend findAll to join latest run per scenario via correlated subquery
- return lastRunStatus and lastRunAt fields in GET /scenarios response
- add Last Run column with badge and timestamp to ScenariosPage
- add integration tests for null and populated lastRunStatus

server/src/scenario/scenario.service.ts

@@ -63,7 +63,7 @@ export class ScenarioService {
 
   async findAll(
     query: PaginationQueryDto<ScenarioOrderBy>,
-  ): Promise<PaginatedResult<ScenarioEntity>> {
+  ): Promise<PaginatedResult<ScenarioEntity & { lastRunStatus: string | null; lastRunAt: string | null }>> {
     const page = query.page ?? 1;
     const limit = query.limit ?? 20;
     const orderBy = query.orderBy ?? "id";
@@ -73,7 +73,39 @@ export class ScenarioService {
       skip: (page - 1) * limit,
       take: limit,
     });
-    return { data, total, page, limit };
+
+    let lastRunByScenario = new Map<string, { status: string; createdAt: Date }>();
+    if (data.length > 0) {
+      const ids = data.map((s) => s.id);
+      const latestRuns = await this.runRepo
+        .createQueryBuilder("r")
+        .select(["r.scenarioId", "r.status", "r.createdAt"])
+        .where("r.scenarioId IN (:...ids)", { ids })
+        .andWhere((qb) => {
+          const sub = qb
+            .subQuery()
+            .select("MAX(r2.createdAt)")
+            .from(ScenarioRunEntity, "r2")
+            .where("r2.scenarioId = r.scenarioId")
+            .getQuery();
+          return `r.createdAt = (${sub})`;
+        })
+        .getMany();
+      lastRunByScenario = new Map(
+        latestRuns.map((r) => [r.scenarioId, { status: r.status, createdAt: r.createdAt }]),
+      );
+    }
+
+    return {
+      data: data.map((s) => ({
+        ...s,
+        lastRunStatus: lastRunByScenario.get(s.id)?.status ?? null,
+        lastRunAt: lastRunByScenario.get(s.id)?.createdAt?.toISOString() ?? null,
+      })),
+      total,
+      page,
+      limit,
+    };
   }
 
   async findOne(id: string): Promise<ScenarioEntity> {