fix: Check ledger range in every handler (#1755)

fixes #1565

tests/unit/rpc/handlers/TransactionEntryTests.cpp

@@ -77,6 +77,8 @@ TEST_F(RPCTransactionEntryHandlerTest, TxHashWrongFormat)
 
 TEST_F(RPCTransactionEntryHandlerTest, NonExistLedgerViaLedgerHash)
 {
+    backend->setRange(10, 30);
+
     // mock fetchLedgerByHash return empty
     ON_CALL(*backend, fetchLedgerByHash(ripple::uint256{INDEX}, _))
         .WillByDefault(Return(std::optional<ripple::LedgerHeader>{}));