feat: Major refactor with batch processing and performance optimization

- Refactor streaming architecture with modular grpc components
- Add batch processing system with backpressure strategies
- Implement performance monitoring and metrics collection
- Add multi-protocol parser with block metadata support
- Enhance configuration system with preset profiles
- Add parse_tx_events example and update documentation
- Optimize yellowstone_grpc client complexity

src/streaming/grpc/connection.rs

@@ -0,0 +1,33 @@
+use std::time::Duration;
+use tonic::transport::channel::ClientTlsConfig;
+use yellowstone_grpc_client::{GeyserGrpcClient, Interceptor};
+use crate::common::AnyResult;
+use crate::streaming::common::constants::{
+    DEFAULT_CONNECT_TIMEOUT, DEFAULT_REQUEST_TIMEOUT, DEFAULT_MAX_DECODING_MESSAGE_SIZE
+};
+
+/// gRPC连接池 - 简化版本
+pub struct GrpcConnectionPool {
+    endpoint: String,
+    x_token: Option<String>,
+}
+
+impl GrpcConnectionPool {
+    pub fn new(endpoint: String, x_token: Option<String>) -> Self {
+        Self {
+            endpoint,
+            x_token,
+        }
+    }
+
+    pub async fn create_connection(&self) -> AnyResult<GeyserGrpcClient<impl Interceptor>> {
+        let builder = GeyserGrpcClient::build_from_shared(self.endpoint.clone())?
+            .x_token(self.x_token.clone())?
+            .tls_config(ClientTlsConfig::new().with_native_roots())?
+            .max_decoding_message_size(DEFAULT_MAX_DECODING_MESSAGE_SIZE)
+            .connect_timeout(Duration::from_secs(DEFAULT_CONNECT_TIMEOUT))
+            .timeout(Duration::from_secs(DEFAULT_REQUEST_TIMEOUT));
+
+        Ok(builder.connect().await?)
+    }
+}