improve admin command error propagation

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

src/admin/command.rs

@@ -1,9 +1,11 @@
 use std::time::SystemTime;
 
 use conduit_service::Services;
+use ruma::EventId;
 
 pub(crate) struct Command<'a> {
 	pub(crate) services: &'a Services,
 	pub(crate) body: &'a [&'a str],
 	pub(crate) timer: SystemTime,
+	pub(crate) reply_id: Option<&'a EventId>,
 }