Optimize Pdu prev_events and auth_events containers.

Signed-off-by: Jason Volk <jason@zemos.net>

src/service/rooms/event_handler/handle_prev_pdu.rs

@@ -1,5 +1,6 @@
 use std::{ops::Range, time::Duration};
 
+use futures::FutureExt;
 use ruma::{
 	CanonicalJsonObject, EventId, MilliSecondsSinceUnixEpoch, RoomId, RoomVersionId, ServerName,
 };
@@ -62,6 +63,7 @@ pub(super) async fn handle_prev_pdu(
 		room_version,
 		create_event_id,
 	)
+	.boxed()
 	.await?;
 
 	Ok(())

src/service/rooms/event_handler/upgrade_outlier_pdu.rs

@@ -212,13 +212,11 @@ pub(super) async fn upgrade_outlier_to_timeline_pdu(
 			.services
 			.state_compressor
 			.save_state(room_id, new_room_state)
-			.boxed()
 			.await?;
 
 		self.services
 			.state
 			.force_state(room_id, shortstatehash, added, removed, &state_lock)
-			.boxed()
 			.await?;
 	}
 

src/service/rooms/timeline/create.rs

@@ -13,7 +13,7 @@ use tuwunel_core::{
 	Error, Result, err, implement,
 	matrix::{
 		event::{Event, StateKey, TypeExt},
-		pdu::{EventHash, PduBuilder, PduEvent},
+		pdu::{EventHash, PduBuilder, PduEvent, PrevEvents},
 		room_version,
 		state_res::{self},
 	},
@@ -43,7 +43,7 @@ pub async fn create_hash_and_sign_event(
 		timestamp,
 	} = pdu_builder;
 
-	let prev_events: Vec<OwnedEventId> = self
+	let prev_events: PrevEvents = self
 		.services
 		.state
 		.get_forward_extremities(room_id)