fix(render+admin): render queue shows ALL users' jobs

The admin render queue called the user-scoped /v1/renders (so it only showed the
admin's own jobs) and parsed items/total instead of data/meta (→ always empty).
- render-svc: GET /v1/admin-renders (admin) → ListAllJobs across users, optional
  ?status= filter; gateway-wired
- admin renders page now fetches /v1/admin-renders and reads data/meta correctly

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

services/render/cmd/server/main.go

@@ -145,6 +145,9 @@ func main() {
 		nodeFonts.DELETE("/:id", fontH.Delete)
 	}
 
+	// ── Render queue (admin: all users' jobs) ─────────────────────────────────
+	v1.GET("/admin-renders", auth, admin, renderH.AdminList)
+
 	// ── Exports management (admin: all users' rendered videos) ────────────────
 	adminExports := v1.Group("/admin-exports", auth, admin)
 	{