fix: add params module to atlantic-2 and arctic-1 genesis

Same issue as pacific-1: the params module was either null or missing
cosmosGasParams, causing v6.4.1 to panic on cold start.

On-chain values are identical across all three networks:
- cosmosGasMultiplierNumerator: 1
- cosmosGasMultiplierDenominator: 1
- globalMinimumGasPrices: 0.02 usei

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: bdchatham

chains/arctic-1/genesis.json

@@ -28461,8 +28461,12 @@
       "price_snapshots": []
     },
     "params": {
-      "fees_params": {
-        "global_minimum_gas_prices": "0.400000000000000000"
+      "feesParams": {
+        "globalMinimumGasPrices": [{"denom": "usei", "amount": "0.020000000000000000"}]
+      },
+      "cosmosGasParams": {
+        "cosmosGasMultiplierNumerator": "1",
+        "cosmosGasMultiplierDenominator": "1"
       }
     },
     "slashing": {

chains/atlantic-2/genesis.json

@@ -26284,7 +26284,15 @@
       "aggregate_exchange_rate_votes": [],
       "price_snapshots": []
     },
-    "params": null,
+    "params": {
+      "feesParams": {
+        "globalMinimumGasPrices": [{"denom": "usei", "amount": "0.020000000000000000"}]
+      },
+      "cosmosGasParams": {
+        "cosmosGasMultiplierNumerator": "1",
+        "cosmosGasMultiplierDenominator": "1"
+      }
+    },
     "slashing": {
       "params": {
         "signed_blocks_window": "10000",