Release v4.0.1: Fix BlockRazor gRPC endpoints and set gRPC as default transport

## Changes since v4.0.0

### Bug Fixes
- Fixed BlockRazor gRPC endpoints to use correct gRPC service URLs
- Set gRPC as the default transport layer for BlockRazor with HTTP fallback

This release improves the reliability and performance of BlockRazor integration by prioritizing gRPC communication while maintaining HTTP fallback compatibility.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "sol-trade-sdk"
-version = "4.0.0"
+version = "4.0.1"
 edition = "2021"
 authors = [
     "William <byteblock6@gmail.com>",

README.md

@@ -90,14 +90,14 @@ Add the dependency to your `Cargo.toml`:
 
 ```toml
 # Add to your Cargo.toml
-sol-trade-sdk = { path = "./sol-trade-sdk", version = "4.0.0" }
+sol-trade-sdk = { path = "./sol-trade-sdk", version = "4.0.1" }
 ```
 
 ### Use crates.io
 
 ```toml
 # Add to your Cargo.toml
-sol-trade-sdk = "4.0.0"
+sol-trade-sdk = "4.0.1"
 ```
 
 ## 🛠️ Usage Examples

README_CN.md

@@ -90,14 +90,14 @@ 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 = "4.0.0" }
+sol-trade-sdk = { path = "./sol-trade-sdk", version = "4.0.1" }
 ```
 
 ### 使用 crates.io
 
 ```toml
 # 添加到您的 Cargo.toml
-sol-trade-sdk = "4.0.0"
+sol-trade-sdk = "4.0.1"
 ```
 
 ## 🛠️ 使用示例