fix: store in_reply_to on remote notes + use full handle in federation component links/actions

crates/domain/src/testing.rs

@@ -847,6 +847,7 @@ impl ActivityPubRepository for TestStore {
         _sensitive: bool,
         _content_warning: Option<String>,
         _visibility: &str,
+        _in_reply_to: Option<&url::Url>,
     ) -> Result<(), DomainError> {
         Ok(())
     }