Release v3.5.0: performance, constants, bilingual docs

- Bump version to 3.5.0
- Performance: hot-path timing only when log_enabled/simulate; execute_parallel takes &[Arc<SwqosClient>]; shared HTTP client constants for SWQoS
- Code quality: validate_protocol_params extracted for buy/sell; BYTES_PER_ACCOUNT, MAX_INSTRUCTIONS_WARN, HTTP timeout constants; prefetch/syscall bypass comments
- Documentation: bilingual (EN + 中文) doc comments in execution, executor, perf, swqos; README/README_CN version and What's new in 3.5.0
- Add release_notes_v3.5.0.md

Co-authored-by: Cursor <cursoragent@cursor.com>

src/trading/common/transaction_builder.rs

@@ -14,13 +14,14 @@ use crate::{
     trading::{MiddlewareManager, core::transaction_pool::{acquire_builder, release_builder}},
 };
 
-/// Build standard RPC transaction
+/// Build standard RPC transaction.
+/// Takes `business_instructions` by reference to avoid per-task Vec clone in execute_parallel.
 pub async fn build_transaction(
     payer: Arc<Keypair>,
     _rpc: Option<Arc<SolanaRpcClient>>,
     unit_limit: u32,
     unit_price: u64,
-    business_instructions: Vec<Instruction>,
+    business_instructions: &[Instruction],
     address_lookup_table_account: Option<AddressLookupTableAccount>,
     recent_blockhash: Option<Hash>,
     middleware_manager: Option<Arc<MiddlewareManager>>,
@@ -57,8 +58,8 @@ pub async fn build_transaction(
         unit_limit,
     ));
 
-    // Add business instructions
-    instructions.extend(business_instructions);
+    // Add business instructions (clone only here; avoids per-task Vec clone in execute_parallel)
+    instructions.extend_from_slice(business_instructions);
 
     // Get blockhash for transaction
     let blockhash = get_transaction_blockhash(recent_blockhash, durable_nonce.clone());