feat: validate that operator account has positive balance#3930

acuarica merged 4 commits intomainhiero-ledger/hiero-json-rpc-relay:mainfrom

3929-operator-has-balance-in-read-write-modehiero-ledger/hiero-json-rpc-relay:3929-operator-has-balance-in-read-write-modeCopy head branch name to clipboard