fix(phase26): batch geocode endpoint for faster server trip scrubber

app.py

@@ -193,6 +193,26 @@ def geocode_route():
     label = _geocode_cached(int(round(lat, 4) * 10000), int(round(lon, 4) * 10000))
     return jsonify(label=label)
 
+@app.route('/api/geocode/batch', methods=['POST'])
+def geocode_batch_route():
+    body = request.get_json(silent=True) or {}
+    coords = body.get("coords")
+    if not isinstance(coords, list) or not coords:
+        return jsonify(error="expected {coords: [{lat, lon}, ...]}"), 400
+    result = {}
+    for item in coords:
+        try:
+            lat = float(item["lat"])
+            lon = float(item["lon"])
+        except (KeyError, ValueError, TypeError):
+            continue
+        lat4 = int(round(lat, 4) * 10000)
+        lon4 = int(round(lon, 4) * 10000)
+        label = _geocode_cached(lat4, lon4)
+        if label:
+            result[f"{lat:.3f},{lon:.3f}"] = label
+    return jsonify(result)
+
 @app.route('/api/dash/devices')
 def dash_devices():
     devices = app_dash.list_usb_storage_partitions()