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/common/fast_timing.rs

@@ -174,7 +174,9 @@ mod tests {
         let total_elapsed = start.elapsed();
         let avg_per_call = total_elapsed.as_nanos() / iterations;
 
-        println!("Average fast_now_nanos() call: {}ns", avg_per_call);
+        if crate::common::sdk_log::sdk_log_enabled() {
+            println!("Average fast_now_nanos() call: {}ns", avg_per_call);
+        }
 
         // 快速时间戳应该非常快（< 100ns per call）
         assert!(avg_per_call < 100);
@@ -193,6 +195,8 @@ mod tests {
         let total_elapsed = start.elapsed();
         let avg_per_call = total_elapsed.as_nanos() / iterations;
 
-        println!("Average Instant::now() call: {}ns", avg_per_call);
+        if crate::common::sdk_log::sdk_log_enabled() {
+            println!("Average Instant::now() call: {}ns", avg_per_call);
+        }
     }
 }