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/event_parser/protocols/block/block_meta_event.rs

@@ -0,0 +1,34 @@
+use crate::impl_unified_event;
+use crate::streaming::event_parser::common::{types::EventType, EventMetadata};
+use borsh::BorshDeserialize;
+use serde::{Deserialize, Serialize};
+
+/// Block元数据事件
+#[derive(Clone, Debug, Default, PartialEq, Eq, Serialize, Deserialize, BorshDeserialize)]
+pub struct BlockMetaEvent {
+    #[borsh(skip)]
+    pub metadata: EventMetadata,
+    pub slot: u64,
+    pub block_hash: String,
+}
+
+impl BlockMetaEvent {
+    pub fn new(slot: u64, block_hash: String, block_time_ms: i64) -> Self {
+        let metadata = EventMetadata::new(
+            format!("block_{}_{}", slot, block_hash),
+            "".to_string(),
+            slot,
+            block_time_ms / 1000,
+            block_time_ms,
+            crate::streaming::event_parser::common::types::ProtocolType::Common,
+            EventType::BlockMeta,
+            solana_sdk::pubkey::Pubkey::default(),
+            "".to_string(),
+            chrono::Utc::now().timestamp_millis(),
+        );
+        Self { metadata, slot, block_hash }
+    }
+}
+
+// 使用macro生成UnifiedEvent实现
+impl_unified_event!(BlockMetaEvent,);