chore: logging for swr fetch

webui/src/util/fetch.ts

@@ -1,4 +1,6 @@
 import { writable } from "svelte/store";
+import { debug } from "debug";
+const dbg = debug("kestrel:swrshim");
 
 // stale shim until https://github.com/ConsoleTVs/sswr/issues/24 is resolved
 export type SWRKey = string;
@@ -10,6 +12,7 @@ export function useSWR<D = unknown, E = Error>(
   const error = writable<E | undefined>();
 
   async function doFetch() {
+    dbg("Fetching: %s", key);
     try {
       const response = await fetch(key, options);
       if (response.ok) {