fix: import LlamaSwapConfig from util in metrics poller

src/lib/metrics-poller.ts

@@ -1,4 +1,5 @@
-import { fetchMetrics, type LlamaSwapConfig } from "./llamaswap";
+import { fetchMetrics } from "./llamaswap";
+import { type LlamaSwapConfig } from "./util";
 import { gpuInfos, parseGpuMetrics, type GpuMetricKind, type GpuSample } from "./metrics-parser";
 
 const RING_SIZE = 60;