feat: implement tests and coverage reports for KpiCards and scrapeLakes functionality

public/data/lakes_index.json

@@ -25,7 +25,7 @@
       14.02,
       1.51,
       1.51,
-      0
+      1.51
     ]
   },
   {
@@ -37,7 +37,7 @@
     "capacity": 100,
     "storageDiff": 48.41,
     "inflow": "3.7",
-    "outflow": "7.2",
+    "outflow": "0.0",
     "volume": 0.62,
     "maxVolume": 1.5,
     "lat": 48.625,
@@ -298,7 +298,7 @@
     "capacity": 74.8,
     "storageDiff": -2.93,
     "inflow": "2.9",
-    "outflow": "0.7",
+    "outflow": "0.0",
     "volume": 26.49,
     "maxVolume": 33.8,
     "lat": 48.847,
@@ -344,7 +344,7 @@
       2.53,
       2.53,
       2.53,
-      0
+      2.53
     ]
   }
 ]