chore: release v3.5.7

Made-with: Cursor

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "sol-trade-sdk"
-version = "3.5.6"
+version = "3.5.7"
 edition = "2021"
 authors = [
     "William <byteblock6@gmail.com>",

README.md

@@ -89,14 +89,14 @@ Add the dependency to your `Cargo.toml`:
 
 ```toml
 # Add to your Cargo.toml
-sol-trade-sdk = { path = "./sol-trade-sdk", version = "3.5.6" }
+sol-trade-sdk = { path = "./sol-trade-sdk", version = "3.5.7" }
 ```
 
 ### Use crates.io
 
 ```toml
 # Add to your Cargo.toml
-sol-trade-sdk = "3.5.6"
+sol-trade-sdk = "3.5.7"
 ```
 
 ## 🛠️ Usage Examples
@@ -333,6 +333,10 @@ MIT License
 - Telegram Group: https://t.me/fnzero_group
 - Discord: https://discord.gg/vuazbGkqQE
 
+## ⏱️ Timing metrics (v3.5.0+)
+
+When `log_enabled` and SDK log are on, the executor prints `[SDK] Buy/Sell timing(...)`. **Semantics changed in v3.5.0**: `submit` is now only the send to SWQOS/RPC; `confirm` is separate; `start_to_submit` (when `grpc_recv_us` is set) is **end-to-end from gRPC event to submit**, so it is larger than in-process timings. See [docs/TIMING_METRICS.md](docs/TIMING_METRICS.md) for definitions and how to compare with older versions.
+
 ## ⚠️ Important Notes
 
 1. Test thoroughly before using on mainnet

README_CN.md

@@ -89,14 +89,14 @@ git clone https://github.com/0xfnzero/sol-trade-sdk
 
 ```toml
 # 添加到您的 Cargo.toml
-sol-trade-sdk = { path = "./sol-trade-sdk", version = "3.5.6" }
+sol-trade-sdk = { path = "./sol-trade-sdk", version = "3.5.7" }
 ```
 
 ### 使用 crates.io
 
 ```toml
 # 添加到您的 Cargo.toml
-sol-trade-sdk = "3.5.6"
+sol-trade-sdk = "3.5.7"
 ```
 
 ## 🛠️ 使用示例