Node Auto-reconnect and connectivity enhancements (#1513)

* Add auto-reconnect
Enhance connectivity issues

* minor enhancement [skip ci]

* minor: remove core secrets since it's empty

* pending transactions fix

* temporary fix for RBF

* remove unused hashes from cache key

* fix minimum limits check

* Add authentication to services api

* update polyseed

* override hashlib package

tool/utils/secret_key.dart

@@ -45,8 +45,6 @@ class SecretKey {
     SecretKey('authorization', () => ''),
   ];
 
-  static final coreSecrets = [];
-
   static final evmChainsSecrets = [
     SecretKey('etherScanApiKey', () => ''),
     SecretKey('polygonScanApiKey', () => ''),