Refactor: Integrate backend API and normalize data

This commit integrates the backend API for fetching and updating report data. It also includes a normalization function to handle data consistency between the API and local storage.

Co-authored-by: anthonymuncher <anthonymuncher@gmail.com>

backend/app/models/classification/class_mapping.json

@@ -0,0 +1,8 @@
+{
+    "0": "broken_streetlight",
+    "1": "drainage",
+    "2": "garbage",
+    "3": "pothole",
+    "4": "signage",
+    "5": "streetlight"
+}