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/common/constants.rs

@@ -0,0 +1,14 @@
+// 流处理相关的常量定义
+
+// 默认配置常量
+pub const DEFAULT_CONNECT_TIMEOUT: u64 = 10;
+pub const DEFAULT_REQUEST_TIMEOUT: u64 = 60;
+pub const DEFAULT_CHANNEL_SIZE: usize = 1000;
+pub const DEFAULT_MAX_DECODING_MESSAGE_SIZE: usize = 1024 * 1024 * 10;
+pub const DEFAULT_BATCH_SIZE: usize = 100;
+pub const DEFAULT_BATCH_TIMEOUT_MS: u64 = 5;
+
+// 性能监控相关常量
+pub const DEFAULT_METRICS_WINDOW_SECONDS: u64 = 5;
+pub const DEFAULT_METRICS_PRINT_INTERVAL_SECONDS: u64 = 10;
+pub const SLOW_PROCESSING_THRESHOLD_MS: f64 = 10.0;