perf: Strip unsigned over federation and generate it on the fly locally

src/api/server/backfill.rs

@@ -3,7 +3,6 @@ use std::cmp;
 use axum::extract::State;
 use conduwuit::{
 	Err, Event, PduCount, Result, info,
-	result::LogErr,
 	utils::{IterStream, ReadyExt, stream::TryTools},
 };
 use futures::{FutureExt, StreamExt, TryStreamExt};
@@ -80,15 +79,6 @@ pub(crate) async fn get_backfill_route(
 				.await
 				.then_some(pdu))
 		})
-		.and_then(async |mut pdu| {
-			// Strip the transaction ID, as that is private
-			pdu.remove_transaction_id().log_err().ok();
-			// Add age, as this is specified
-			pdu.add_age().log_err().ok();
-			// It's not clear if we should strip or add any more data, leave as
-			// is. In particular: Redaction?
-			Ok(pdu)
-		})
 		.try_filter_map(|pdu| async move {
 			Ok(services
 				.rooms