fix(files): expose expiry and disable expired downloads

- return expiresAt and createdAt for scenario and run file metadata\n- keep download actions visible while preventing expired file access

server/src/scenario/scenario.service.ts

@@ -732,6 +732,9 @@ export class ScenarioService {
         name: item.name,
         mimeType: item.mimeType,
         size: item.size,
+        sha256: item.sha256,
+        expiresAt: item.expiresAt,
+        createdAt: item.createdAt,
       })),
       total: result.total,
     };
@@ -790,6 +793,9 @@ export class ScenarioService {
         name: item.name,
         mimeType: item.mimeType,
         size: item.size,
+        sha256: item.sha256,
+        expiresAt: item.expiresAt,
+        createdAt: item.createdAt,
       })),
       total: result.total,
     };