Work on rooms/state, database, alias, directory, edus services, event_handler, lazy_loading, metadata, outlier, and pdu_metadata

src/service/rooms/outlier/data.rs

@@ -0,0 +1,5 @@
+pub trait Data {
+    fn get_outlier_pdu_json(&self, event_id: &EventId) -> Result<Option<CanonicalJsonObject>>;
+    fn get_outlier_pdu(&self, event_id: &EventId) -> Result<Option<PduEvent>>;
+    fn add_pdu_outlier(&self, event_id: &EventId, pdu: &CanonicalJsonObject) -> Result<()>;
+}