fix: some compile time errors

Only 174 errors left!

src/service/rooms/state_accessor/data.rs

@@ -1,3 +1,9 @@
+use std::{sync::Arc, collections::HashMap};
+
+use ruma::{EventId, events::StateEventType, RoomId};
+
+use crate::PduEvent;
+
 pub trait Data {
     /// Builds a StateMap by iterating over all keys that start
     /// with state_hash, this gives the full state for the given state_hash.