perf: Don't increment the device list version when updating local info

src/api/client/sync/v5.rs

@@ -7,7 +7,7 @@ use std::{
 
 use axum::extract::State;
 use conduwuit::{
-	Err, Error, Result, at, err, error, extract_variant, is_equal_to,
+	Err, Error, Result, at, error, extract_variant, is_equal_to,
 	matrix::{Event, TypeStateKey, pdu::PduCount},
 	trace,
 	utils::{
@@ -72,11 +72,11 @@ pub(crate) async fn sync_events_v5_route(
 		.users
 		.get_device_metadata(sender_user, sender_device)
 		.await
-		.or_else(|_| err!(Request(NotFound("device {sender_device} not found?"))))?;
+		.expect("Device metadata should exist for authenticated device");
 	device.last_seen_ts = Some(MilliSecondsSinceUnixEpoch::now());
 	services
 		.users
-		.update_device_metadata(sender_user, sender_device, &device)
+		.update_device_last_seen(sender_user, sender_device, &device)
 		.await?;
 
 	let mut body = body.body;