feat: optimize RPC polling and remove data size limit

Significantly reduce RPC pressure and fix MaxLoadedAccountsDataSizeExceeded errors.

Major improvements:
1. Add wait_confirmation parameter to all swqos clients
   - Skip polling entirely when wait_transaction_confirmed=false (100% RPC reduction)
   - Optimize getTransaction calls to only execute on errors or after 10s (50% reduction)
   - Update all 13 swqos client implementations

2. Remove LoadedAccountsDataSize instruction and data_size_limit parameter
   - Eliminate MaxLoadedAccountsDataSizeExceeded errors reported by users
   - Clean up gas_fee_strategy, params, and transaction builder
   - Simplify compute budget instruction generation

Results:
- Single channel: 30 RPC calls → 0-15 calls (50-100% reduction)
- Multi-channel (3x): 90 RPC calls → 0-45 calls (50-100% reduction)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/trading/common/transaction_builder.rs

@@ -24,7 +24,6 @@ pub async fn build_transaction(
     business_instructions: Vec<Instruction>,
     address_lookup_table_account: Option<AddressLookupTableAccount>,
     recent_blockhash: Option<Hash>,
-    data_size_limit: u32,
     middleware_manager: Option<Arc<MiddlewareManager>>,
     protocol_name: &str,
     is_buy: bool,
@@ -57,8 +56,6 @@ pub async fn build_transaction(
     instructions.extend(compute_budget_instructions(
         unit_price,
         unit_limit,
-        data_size_limit,
-        is_buy,
     ));
 
     // Add business instructions