fix: remove debug console.error from ensureFiles

- Removed '[ensureFiles] starting' console.error
- Not an actual error, just debug log
- Follows 'no dev residue' guideline

src/store.ts

@@ -619,7 +619,6 @@ let _unassignedTracesLoading = false
 let _lastLoadedFileUuid: string | undefined = undefined
 
 export async function ensureFiles() {
-  console.error('[ensureFiles] starting, filesLoaded.value:', filesLoaded.value)
   if (filesLoaded.value) return
   if (_filesLoading) {
     await new Promise<void>(r => { const check = setInterval(() => { if (filesLoaded.value || !_filesLoading) { clearInterval(check); r() } }, 100) })