refactor(dashboard): reorganize overlay and multiproof panel layout

Fixed overlapping panel positions and grouped related metrics together:

**Overlay State Provider panels (y: 129-177)**:
- Row y=129: Total Duration (full width)
- Row y=137: Provider Creation + Block Hash Lookup (side-by-side)
- Row y=145: Reverts Validation + Trie Reverts + From Reverts (3 cols)
- Row y=153: Reverts Decision Breakdown (full width)
- Row y=161: Fetch Efficiency (full width)
- Row y=169: Checkpoint Delta + State root latency (side-by-side)

**MultiProof panels (y: 177-193)**:
- Row y=177: Pending MultiProof + Redundant storage nodes
- Row y=185: Redundant account nodes + State root latency heatmap
- Row y=193: Proof fetching + Block validation

All overlay metrics are now grouped together without unrelated panels in between.

dashboard.json

@@ -5807,7 +5807,7 @@
       },
       "gridPos": {
         "h": 8,
-        "w": 24,
+        "w": 12,
         "x": 0,
         "y": 169
       },
@@ -5912,7 +5912,7 @@
         "h": 8,
         "w": 12,
         "x": 0,
-        "y": 153
+        "y": 177
       },
       "id": 257,
       "options": {
@@ -6025,7 +6025,7 @@
         "h": 8,
         "w": 12,
         "x": 12,
-        "y": 153
+        "y": 177
       },
       "id": 261,
       "options": {
@@ -6125,7 +6125,7 @@
         "h": 8,
         "w": 12,
         "x": 0,
-        "y": 161
+        "y": 185
       },
       "id": 262,
       "options": {
@@ -6356,7 +6356,7 @@
       "gridPos": {
         "h": 8,
         "w": 12,
-        "x": 0,
+        "x": 12,
         "y": 169
       },
       "id": 263,
@@ -6430,8 +6430,8 @@
       "gridPos": {
         "h": 8,
         "w": 12,
-        "x": 12,
-        "y": 169
+        "x": 0,
+        "y": 193
       },
       "id": 42,
       "maxDataPoints": 25,
@@ -13404,5 +13404,5 @@
   "timezone": "",
   "title": "Reth0",
   "uid": "adkq78t",
-  "version": 12
+  "version": 19
 }