cleanup: alte GIS-Fetch-Dateien und unnötige Service-Imports entfernt – vollständige Umstellung auf zentrale Thunks abgeschlossen

redux/thunks/database/fetchLocationDevicesThunk.js

@@ -0,0 +1,7 @@
+// /redux/thunks/fetchLocationDevicesThunk.js
+import { createAsyncThunk } from "@reduxjs/toolkit";
+import { fetchLocationDevicesService } from "../../../services/database/fetchLocationDevicesService";
+
+export const fetchLocationDevicesThunk = createAsyncThunk("locationDevices/fetch", async () => {
+  return await fetchLocationDevicesService();
+});