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/bonk/parser.rs

@@ -113,19 +113,16 @@ pub const CONFIGS: &[GenericEventParseConfig] = &[
 fn parse_pool_create_inner_instruction(
     data: &[u8],
     metadata: EventMetadata,
-) -> Option<Box<dyn UnifiedEvent>> {
+) -> Option<UnifiedEvent> {
     if let Some(event) = bonk_pool_create_event_log_decode(data) {
-        Some(Box::new(BonkPoolCreateEvent { metadata, ..event }))
+        Some(UnifiedEvent::BonkPoolCreateEvent(BonkPoolCreateEvent { metadata, ..event }))
     } else {
         None
     }
 }
 
 /// Parse trade event
-fn parse_trade_inner_instruction(
-    data: &[u8],
-    metadata: EventMetadata,
-) -> Option<Box<dyn UnifiedEvent>> {
+fn parse_trade_inner_instruction(data: &[u8], metadata: EventMetadata) -> Option<UnifiedEvent> {
     if let Some(event) = bonk_trade_event_log_decode(data) {
         if metadata.event_type == EventType::BonkBuyExactIn
             || metadata.event_type == EventType::BonkBuyExactOut
@@ -139,7 +136,7 @@ fn parse_trade_inner_instruction(
         {
             return None;
         }
-        Some(Box::new(BonkTradeEvent { metadata, ..event }))
+        Some(UnifiedEvent::BonkTradeEvent(BonkTradeEvent { metadata, ..event }))
     } else {
         None
     }
@@ -150,7 +147,7 @@ fn parse_buy_exact_in_instruction(
     data: &[u8],
     accounts: &[Pubkey],
     metadata: EventMetadata,
-) -> Option<Box<dyn UnifiedEvent>> {
+) -> Option<UnifiedEvent> {
     if data.len() < 16 || accounts.len() < 18 {
         return None;
     }
@@ -159,7 +156,7 @@ fn parse_buy_exact_in_instruction(
     let minimum_amount_out = read_u64_le(data, 8)?;
     let share_fee_rate = read_u64_le(data, 16)?;
 
-    Some(Box::new(BonkTradeEvent {
+    Some(UnifiedEvent::BonkTradeEvent(BonkTradeEvent {
         metadata,
         amount_in,
         minimum_amount_out,
@@ -188,7 +185,7 @@ fn parse_buy_exact_out_instruction(
     data: &[u8],
     accounts: &[Pubkey],
     metadata: EventMetadata,
-) -> Option<Box<dyn UnifiedEvent>> {
+) -> Option<UnifiedEvent> {
     if data.len() < 16 || accounts.len() < 18 {
         return None;
     }
@@ -197,7 +194,7 @@ fn parse_buy_exact_out_instruction(
     let maximum_amount_in = read_u64_le(data, 8)?;
     let share_fee_rate = read_u64_le(data, 16)?;
 
-    Some(Box::new(BonkTradeEvent {
+    Some(UnifiedEvent::BonkTradeEvent(BonkTradeEvent {
         metadata,
         amount_out,
         maximum_amount_in,
@@ -226,7 +223,7 @@ fn parse_sell_exact_in_instruction(
     data: &[u8],
     accounts: &[Pubkey],
     metadata: EventMetadata,
-) -> Option<Box<dyn UnifiedEvent>> {
+) -> Option<UnifiedEvent> {
     if data.len() < 16 || accounts.len() < 18 {
         return None;
     }
@@ -235,7 +232,7 @@ fn parse_sell_exact_in_instruction(
     let minimum_amount_out = read_u64_le(data, 8)?;
     let share_fee_rate = read_u64_le(data, 16)?;
 
-    Some(Box::new(BonkTradeEvent {
+    Some(UnifiedEvent::BonkTradeEvent(BonkTradeEvent {
         metadata,
         amount_in,
         minimum_amount_out,
@@ -264,7 +261,7 @@ fn parse_sell_exact_out_instruction(
     data: &[u8],
     accounts: &[Pubkey],
     metadata: EventMetadata,
-) -> Option<Box<dyn UnifiedEvent>> {
+) -> Option<UnifiedEvent> {
     if data.len() < 16 || accounts.len() < 18 {
         return None;
     }
@@ -273,7 +270,7 @@ fn parse_sell_exact_out_instruction(
     let maximum_amount_in = read_u64_le(data, 8)?;
     let share_fee_rate = read_u64_le(data, 16)?;
 
-    Some(Box::new(BonkTradeEvent {
+    Some(UnifiedEvent::BonkTradeEvent(BonkTradeEvent {
         metadata,
         amount_out,
         maximum_amount_in,
@@ -303,7 +300,7 @@ fn parse_initialize_instruction(
     data: &[u8],
     accounts: &[Pubkey],
     metadata: EventMetadata,
-) -> Option<Box<dyn UnifiedEvent>> {
+) -> Option<UnifiedEvent> {
     if data.len() < 24 {
         return None;
     }
@@ -313,7 +310,7 @@ fn parse_initialize_instruction(
     let curve_param = parse_curve_params(data, &mut offset)?;
     let vesting_param = parse_vesting_params(data, &mut offset)?;
 
-    Some(Box::new(BonkPoolCreateEvent {
+    Some(UnifiedEvent::BonkPoolCreateEvent(BonkPoolCreateEvent {
         metadata,
         payer: accounts[0],
         creator: accounts[1],
@@ -336,7 +333,7 @@ fn parse_initialize_v2_instruction(
     data: &[u8],
     accounts: &[Pubkey],
     metadata: EventMetadata,
-) -> Option<Box<dyn UnifiedEvent>> {
+) -> Option<UnifiedEvent> {
     if data.len() < 24 {
         return None;
     }
@@ -347,7 +344,7 @@ fn parse_initialize_v2_instruction(
     let vesting_param = parse_vesting_params(data, &mut offset)?;
     let amm_fee_on = data[offset];
 
-    Some(Box::new(BonkPoolCreateEvent {
+    Some(UnifiedEvent::BonkPoolCreateEvent(BonkPoolCreateEvent {
         metadata,
         payer: accounts[0],
         creator: accounts[1],
@@ -375,7 +372,7 @@ fn parse_initialize_with_token_2022_instruction(
     data: &[u8],
     accounts: &[Pubkey],
     metadata: EventMetadata,
-) -> Option<Box<dyn UnifiedEvent>> {
+) -> Option<UnifiedEvent> {
     if data.len() < 24 {
         return None;
     }
@@ -386,7 +383,7 @@ fn parse_initialize_with_token_2022_instruction(
     let vesting_param = parse_vesting_params(data, &mut offset)?;
     let amm_fee_on = data[offset];
 
-    Some(Box::new(BonkPoolCreateEvent {
+    Some(UnifiedEvent::BonkPoolCreateEvent(BonkPoolCreateEvent {
         metadata,
         payer: accounts[0],
         creator: accounts[1],
@@ -519,7 +516,7 @@ fn parse_migrate_to_amm_instruction(
     data: &[u8],
     accounts: &[Pubkey],
     metadata: EventMetadata,
-) -> Option<Box<dyn UnifiedEvent>> {
+) -> Option<UnifiedEvent> {
     if data.len() < 16 {
         return None;
     }
@@ -528,7 +525,7 @@ fn parse_migrate_to_amm_instruction(
     let quote_lot_size = u64::from_le_bytes(data[8..16].try_into().unwrap());
     let market_vault_signer_nonce = data[16];
 
-    Some(Box::new(BonkMigrateToAmmEvent {
+    Some(UnifiedEvent::BonkMigrateToAmmEvent(BonkMigrateToAmmEvent {
         metadata,
         base_lot_size,
         quote_lot_size,
@@ -574,8 +571,8 @@ fn parse_migrate_to_cpswap_instruction(
     _data: &[u8],
     accounts: &[Pubkey],
     metadata: EventMetadata,
-) -> Option<Box<dyn UnifiedEvent>> {
-    Some(Box::new(BonkMigrateToCpswapEvent {
+) -> Option<UnifiedEvent> {
+    Some(UnifiedEvent::BonkMigrateToCpswapEvent(BonkMigrateToCpswapEvent {
         metadata,
         payer: accounts[0],
         base_mint: accounts[1],