refactor: restructure event handling from trait objects to enum pattern

- Convert UnifiedEvent from trait object (Box<dyn UnifiedEvent>) to concrete enum type
  - Remove match_event! macro in favor of native match expressions
  - Simplify event metadata access: event.event_type() -> event.metadata().event_type
  - Unify event callback signatures: Fn(Box<dyn UnifiedEvent>) -> Fn(UnifiedEvent)
  - Update all example code to use the new enum-based event system
  - Optimize type system to reduce runtime overhead and improve type safety

  Affected scope:
  - Core event parser and processor
  - All protocol event definitions (PumpFun, PumpSwap, Bonk, Raydium series, etc.)
  - gRPC and Shred streaming modules
  - All example code

src/streaming/event_parser/protocols/raydium_amm_v4/events.rs

@@ -1,6 +1,6 @@
 use crate::streaming::event_parser::common::EventMetadata;
 use crate::{
-    impl_unified_event, streaming::event_parser::protocols::raydium_amm_v4::types::AmmInfo,
+    streaming::event_parser::protocols::raydium_amm_v4::types::AmmInfo,
 };
 use borsh::BorshDeserialize;
 use serde::{Deserialize, Serialize};
@@ -38,8 +38,6 @@ pub struct RaydiumAmmV4SwapEvent {
     pub user_source_owner: Pubkey,
 }
 
-impl_unified_event!(RaydiumAmmV4SwapEvent,);
-
 /// 添加流动性
 #[derive(Clone, Debug, Default, PartialEq, Eq, Serialize, Deserialize, BorshDeserialize)]
 pub struct RaydiumAmmV4DepositEvent {
@@ -64,7 +62,6 @@ pub struct RaydiumAmmV4DepositEvent {
     pub user_owner: Pubkey,
     pub serum_event_queue: Pubkey,
 }
-impl_unified_event!(RaydiumAmmV4DepositEvent,);
 
 /// 初始化
 #[derive(Clone, Debug, Default, PartialEq, Eq, Serialize, Deserialize, BorshDeserialize)]
@@ -98,7 +95,6 @@ pub struct RaydiumAmmV4Initialize2Event {
     pub user_token_pc: Pubkey,
     pub user_lp_token_account: Pubkey,
 }
-impl_unified_event!(RaydiumAmmV4Initialize2Event,);
 
 /// 移除流动性
 #[derive(Clone, Debug, Default, PartialEq, Eq, Serialize, Deserialize, BorshDeserialize)]
@@ -130,7 +126,6 @@ pub struct RaydiumAmmV4WithdrawEvent {
     pub serum_bids: Pubkey,
     pub serum_asks: Pubkey,
 }
-impl_unified_event!(RaydiumAmmV4WithdrawEvent,);
 
 /// 提现
 #[derive(Clone, Debug, Default, PartialEq, Eq, Serialize, Deserialize, BorshDeserialize)]
@@ -156,7 +151,6 @@ pub struct RaydiumAmmV4WithdrawPnlEvent {
     pub serum_pc_vault_account: Pubkey,
     pub serum_vault_signer: Pubkey,
 }
-impl_unified_event!(RaydiumAmmV4WithdrawPnlEvent,);
 
 /// 池信息
 #[derive(Clone, Debug, Default, PartialEq, Eq, Serialize, Deserialize, BorshDeserialize)]
@@ -170,7 +164,6 @@ pub struct RaydiumAmmV4AmmInfoAccountEvent {
     pub rent_epoch: u64,
     pub amm_info: AmmInfo,
 }
-impl_unified_event!(RaydiumAmmV4AmmInfoAccountEvent,);
 
 /// 事件鉴别器常量
 pub mod discriminators {

src/streaming/event_parser/protocols/raydium_amm_v4/parser.rs

@@ -82,12 +82,12 @@ fn parse_withdraw_pnl_instruction(
     _data: &[u8],
     accounts: &[Pubkey],
     metadata: EventMetadata,
-) -> Option<Box<dyn UnifiedEvent>> {
+) -> Option<UnifiedEvent> {
     if accounts.len() < 17 {
         return None;
     }
 
-    Some(Box::new(RaydiumAmmV4WithdrawPnlEvent {
+    Some(UnifiedEvent::RaydiumAmmV4WithdrawPnlEvent(RaydiumAmmV4WithdrawPnlEvent {
         metadata,
         token_program: accounts[0],
         amm: accounts[1],
@@ -114,13 +114,13 @@ fn parse_withdraw_instruction(
     data: &[u8],
     accounts: &[Pubkey],
     metadata: EventMetadata,
-) -> Option<Box<dyn UnifiedEvent>> {
+) -> Option<UnifiedEvent> {
     if data.len() < 8 || accounts.len() < 22 {
         return None;
     }
     let amount = read_u64_le(data, 0)?;
 
-    Some(Box::new(RaydiumAmmV4WithdrawEvent {
+    Some(UnifiedEvent::RaydiumAmmV4WithdrawEvent(RaydiumAmmV4WithdrawEvent {
         metadata,
         amount,
 
@@ -154,7 +154,7 @@ fn parse_initialize2_instruction(
     data: &[u8],
     accounts: &[Pubkey],
     metadata: EventMetadata,
-) -> Option<Box<dyn UnifiedEvent>> {
+) -> Option<UnifiedEvent> {
     if data.len() < 25 || accounts.len() < 21 {
         return None;
     }
@@ -163,7 +163,7 @@ fn parse_initialize2_instruction(
     let init_pc_amount = read_u64_le(data, 9)?;
     let init_coin_amount = read_u64_le(data, 17)?;
 
-    Some(Box::new(RaydiumAmmV4Initialize2Event {
+    Some(UnifiedEvent::RaydiumAmmV4Initialize2Event(RaydiumAmmV4Initialize2Event {
         metadata,
         nonce,
         open_time,
@@ -199,7 +199,7 @@ fn parse_deposit_instruction(
     data: &[u8],
     accounts: &[Pubkey],
     metadata: EventMetadata,
-) -> Option<Box<dyn UnifiedEvent>> {
+) -> Option<UnifiedEvent> {
     if data.len() < 24 || accounts.len() < 14 {
         return None;
     }
@@ -207,7 +207,7 @@ fn parse_deposit_instruction(
     let max_pc_amount = read_u64_le(data, 8)?;
     let base_side = read_u64_le(data, 16)?;
 
-    Some(Box::new(RaydiumAmmV4DepositEvent {
+    Some(UnifiedEvent::RaydiumAmmV4DepositEvent(RaydiumAmmV4DepositEvent {
         metadata,
         max_coin_amount,
         max_pc_amount,
@@ -235,7 +235,7 @@ fn parse_swap_base_output_instruction(
     data: &[u8],
     accounts: &[Pubkey],
     metadata: EventMetadata,
-) -> Option<Box<dyn UnifiedEvent>> {
+) -> Option<UnifiedEvent> {
     if data.len() < 16 || accounts.len() < 17 {
         return None;
     }
@@ -249,7 +249,7 @@ fn parse_swap_base_output_instruction(
         accounts.insert(4, Pubkey::default());
     }
 
-    Some(Box::new(RaydiumAmmV4SwapEvent {
+    Some(UnifiedEvent::RaydiumAmmV4SwapEvent(RaydiumAmmV4SwapEvent {
         metadata,
         max_amount_in,
         amount_out,
@@ -282,7 +282,7 @@ fn parse_swap_base_input_instruction(
     data: &[u8],
     accounts: &[Pubkey],
     metadata: EventMetadata,
-) -> Option<Box<dyn UnifiedEvent>> {
+) -> Option<UnifiedEvent> {
     if data.len() < 16 || accounts.len() < 17 {
         return None;
     }
@@ -296,7 +296,7 @@ fn parse_swap_base_input_instruction(
         accounts.insert(4, Pubkey::default());
     }
 
-    Some(Box::new(RaydiumAmmV4SwapEvent {
+    Some(UnifiedEvent::RaydiumAmmV4SwapEvent(RaydiumAmmV4SwapEvent {
         metadata,
         amount_in,
         minimum_amount_out,

src/streaming/event_parser/protocols/raydium_amm_v4/types.rs

@@ -86,15 +86,12 @@ pub fn amm_info_decode(data: &[u8]) -> Option<AmmInfo> {
     borsh::from_slice::<AmmInfo>(&data[..AMM_INFO_SIZE]).ok()
 }
 
-pub fn amm_info_parser(
-    account: &AccountPretty,
-    metadata: EventMetadata,
-) -> Option<Box<dyn UnifiedEvent>> {
+pub fn amm_info_parser(account: &AccountPretty, metadata: EventMetadata) -> Option<UnifiedEvent> {
     if account.data.len() < AMM_INFO_SIZE {
         return None;
     }
     if let Some(amm_info) = amm_info_decode(&account.data[..AMM_INFO_SIZE]) {
-        Some(Box::new(RaydiumAmmV4AmmInfoAccountEvent {
+        Some(UnifiedEvent::RaydiumAmmV4AmmInfoAccountEvent(RaydiumAmmV4AmmInfoAccountEvent {
             metadata,
             pubkey: account.pubkey,
             executable: account.executable,