CW-974: Add support for automatic node switching. (#2361)

* feat: Add support for automatic node switching.

This change:
- Adds isTrustedNodeForSwitching property to Node class.
- Adds UI Checkbox to mark a node as trusted for automatic switching in Node create or edit form.
- Implements checkNodeHealth method in wallet classes to verify node connectivity.
- Adds NodeSwitchingService for managing automatic node switching based on health checks.
- Adds setting option for user to enable/disable automated node switching

* fix(automatic-node-switch): Set node health check interval to 5 minutes in NodeSwitchingService

* refactor: Update handler method

* feat: Automatic Node Switching Improvements

This change:
- Moves enable automatic node switch to the Manage Nodes Page
- Adds check to verify node health before attempting to sync in EVM, Sol and Tron Wallets.
- Modifies trusted ndoes list for monero
- Adds trigger for Node Health Check when app resumes from background

* fix: Increase default request timeout for Tron and update health check interval for node switch

* feat: Enhance Node health check functionality.

This change adds additional checks for token balance in EVM, Solana and Tron Wallets in checkNodeHealth.

* fix: Update health check interval to 30 seconds in NodeSwitchingService

* Update bitcoin_electrum_server_list.yml

* fix: Electru wallet not connecting to new node after switching

* fix: Automated Node Switch not working on Decred Wallet

* fix: Add more nodes for AutoSwitching

This change:
- Enables more nodes across wallet types for auto switching
- Modifies CTA for checkbox
- Renames flags to fit

* fix: Add migration function for setting up default nodes for autoswitching

* fix: Review and testing fixes

* chore: Adjust balance and history fetch timer

lib/store/settings_store.dart

@@ -128,6 +128,7 @@ abstract class SettingsStoreBase with Store {
       required this.mwebEnabled,
       required this.hasEnabledMwebBefore,
       required this.mwebNodeUri,
+      required bool initialEnableAutomaticNodeSwitching,
       TransactionPriority? initialBitcoinTransactionPriority,
       TransactionPriority? initialMoneroTransactionPriority,
       TransactionPriority? initialWowneroTransactionPriority,
@@ -186,6 +187,7 @@ abstract class SettingsStoreBase with Store {
         currentSyncMode = initialSyncMode,
         currentSyncAll = initialSyncAll,
         currentBuiltinTor = initialBuiltinTor,
+        enableAutomaticNodeSwitching = initialEnableAutomaticNodeSwitching,
         priority = ObservableMap<WalletType, TransactionPriority>() {
     //this.nodes = ObservableMap<WalletType, Node>.of(nodes);
 
@@ -613,6 +615,11 @@ abstract class SettingsStoreBase with Store {
         (_) => mwebNodeUri,
         (String mwebNodeUri) =>
             _sharedPreferences.setString(PreferencesKey.mwebNodeUri, mwebNodeUri));
+    
+    reaction(
+        (_) => enableAutomaticNodeSwitching,
+        (bool enableAutomaticNodeSwitching) => _sharedPreferences.setBool(
+            PreferencesKey.enableAutomaticNodeSwitching, enableAutomaticNodeSwitching));
 
     this.nodes.observe((change) {
       if (change.newValue != null && change.key != null) {
@@ -859,6 +866,9 @@ abstract class SettingsStoreBase with Store {
   @observable
   String mwebNodeUri;
 
+  @observable
+  bool enableAutomaticNodeSwitching;
+
   final SecureStorage _secureStorage;
   final SharedPreferences _sharedPreferences;
 
@@ -1034,6 +1044,8 @@ abstract class SettingsStoreBase with Store {
         sharedPreferences.getBool(PreferencesKey.hasEnabledMwebBefore) ?? false;
     final mwebNodeUri = sharedPreferences.getString(PreferencesKey.mwebNodeUri) ??
         "ltc-electrum.cakewallet.com:9333";
+    final enableAutomaticNodeSwitching =
+        sharedPreferences.getBool(PreferencesKey.enableAutomaticNodeSwitching) ?? true;
 
     // If no value
     if (pinLength == null || pinLength == 0) {
@@ -1335,6 +1347,7 @@ abstract class SettingsStoreBase with Store {
       mwebEnabled: mwebEnabled,
       mwebNodeUri: mwebNodeUri,
       hasEnabledMwebBefore: hasEnabledMwebBefore,
+      initialEnableAutomaticNodeSwitching: enableAutomaticNodeSwitching,
       initialMoneroTransactionPriority: moneroTransactionPriority,
       initialWowneroTransactionPriority: wowneroTransactionPriority,
       initialZanoTransactionPriority: zanoTransactionPriority,
@@ -1478,6 +1491,9 @@ abstract class SettingsStoreBase with Store {
     actionlistDisplayMode = ObservableList<ActionListDisplayMode>();
     actionlistDisplayMode.addAll(deserializeActionlistDisplayModes(
         sharedPreferences.getInt(PreferencesKey.displayActionListModeKey) ?? defaultActionsMode));
+    enableAutomaticNodeSwitching =
+        sharedPreferences.getBool(PreferencesKey.enableAutomaticNodeSwitching) ??
+            enableAutomaticNodeSwitching;
     var pinLength = sharedPreferences.getInt(PreferencesKey.currentPinLength);
     // If no value
     if (pinLength == null || pinLength == 0) {