feat(api): Upgrade to v0.1.5 with improved event subscription API

This update includes the following improvements:
- Version upgraded to 0.1.5
- Added subscribe_events_v2 API with more granular account filtering
- Marked original subscribe_events API as deprecated
- Fixed bug

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

@@ -226,9 +226,15 @@ impl EventParser for PumpFunEventParser {
         signature: &str,
         slot: u64,
         block_time: Option<Timestamp>,
+        index: String,
     ) -> Vec<Box<dyn UnifiedEvent>> {
-        self.inner
-            .parse_events_from_inner_instruction(inner_instruction, signature, slot, block_time)
+        self.inner.parse_events_from_inner_instruction(
+            inner_instruction,
+            signature,
+            slot,
+            block_time,
+            index,
+        )
     }
 
     fn parse_events_from_instruction(
@@ -238,9 +244,16 @@ impl EventParser for PumpFunEventParser {
         signature: &str,
         slot: u64,
         block_time: Option<Timestamp>,
+        index: String,
     ) -> Vec<Box<dyn UnifiedEvent>> {
-        self.inner
-            .parse_events_from_instruction(instruction, accounts, signature, slot, block_time)
+        self.inner.parse_events_from_instruction(
+            instruction,
+            accounts,
+            signature,
+            slot,
+            block_time,
+            index,
+        )
     }
 
     fn should_handle(&self, program_id: &Pubkey) -> bool {