refactor: Replace global address lookup table cache with direct fetch approach

Replace the global AddressLookupTableCache with a direct fetch function to simplify address lookup table management. This change improves code maintainability by removing global state and makes the API more explicit.

Key changes:
- Remove AddressLookupTableCache and AddressLookupManager
- Add new fetch_address_lookup_table_account function
- Update TradeBuyParams and TradeSellParams to use AddressLookupTableAccount instead of Pubkey
- Update all examples to use the new direct fetch approach
- Update documentation to reflect the simplified workflow

src/lib.rs

@@ -29,6 +29,7 @@ use common::SolanaRpcClient;
 use parking_lot::Mutex;
 use rustls::crypto::{ring::default_provider, CryptoProvider};
 use solana_sdk::hash::Hash;
+use solana_sdk::message::AddressLookupTableAccount;
 use solana_sdk::signer::Signer;
 use solana_sdk::{pubkey::Pubkey, signature::Keypair, signature::Signature};
 use std::sync::Arc;
@@ -93,7 +94,7 @@ pub struct TradeBuyParams {
     pub extension_params: Box<dyn ProtocolParams>,
     // Extended configuration
     /// Optional address lookup table for transaction size optimization
-    pub lookup_table_key: Option<Pubkey>,
+    pub address_lookup_table_account: Option<AddressLookupTableAccount>,
     /// Whether to wait for transaction confirmation before returning
     pub wait_transaction_confirmed: bool,
     /// Whether to create input token associated token account
@@ -135,7 +136,7 @@ pub struct TradeSellParams {
     pub extension_params: Box<dyn ProtocolParams>,
     // Extended configuration
     /// Optional address lookup table for transaction size optimization
-    pub lookup_table_key: Option<Pubkey>,
+    pub address_lookup_table_account: Option<AddressLookupTableAccount>,
     /// Whether to wait for transaction confirmation before returning
     pub wait_transaction_confirmed: bool,
     /// Whether to create output token associated token account
@@ -292,7 +293,7 @@ impl SolanaTrade {
             output_token_program: None,
             input_amount: Some(params.input_token_amount),
             slippage_basis_points: params.slippage_basis_points,
-            lookup_table_key: params.lookup_table_key,
+            address_lookup_table_account: params.address_lookup_table_account,
             recent_blockhash: params.recent_blockhash,
             data_size_limit: 256 * 1024,
             wait_transaction_confirmed: params.wait_transaction_confirmed,
@@ -385,7 +386,7 @@ impl SolanaTrade {
             output_token_program: None,
             input_amount: Some(params.input_token_amount),
             slippage_basis_points: params.slippage_basis_points,
-            lookup_table_key: params.lookup_table_key,
+            address_lookup_table_account: params.address_lookup_table_account,
             recent_blockhash: params.recent_blockhash,
             wait_transaction_confirmed: params.wait_transaction_confirmed,
             protocol_params: protocol_params.clone(),