fix: rust 1.95.0 clippy lints and matrix-sdk 0.17 API changes

Toolchain bump surfaced new lints (derivable_impls,
unnecessary_unwrap, unnecessary_sort_by, while_let_loop,
collapsible_match, unnecessary_option_map_or_else, cmp_owned)
across bft-json-crdt and huskies-server. All fixed mechanically.

Cargo.toml: dropped the no-longer-existing `rustls-tls` matrix-sdk
feature, then chased through the 0.17 API breakage:
- Relation::Reply is now a tuple variant wrapping Reply, not a
  struct variant with `in_reply_to`
- UserIdentifier::UserIdOrLocalpart removed — use
  UserIdentifier::Matrix(MatrixUserIdentifier::new(..))
- SendMessageLikeEventResult no longer exposes event_id directly;
  it's now on the inner `response` field

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

server/src/chat/transport/matrix/bot/mentions.rs

@@ -61,7 +61,7 @@ pub(super) async fn is_reply_to_bot(
     bot_sent_event_ids: &TokioMutex<HashSet<OwnedEventId>>,
 ) -> bool {
     let candidate_ids: Vec<&OwnedEventId> = match relates_to {
-        Some(Relation::Reply { in_reply_to }) => vec![&in_reply_to.event_id],
+        Some(Relation::Reply(reply)) => vec![&reply.in_reply_to.event_id],
         Some(Relation::Thread(thread)) => {
             let mut ids = vec![&thread.event_id];
             if let Some(irti) = &thread.in_reply_to {
@@ -216,8 +216,9 @@ mod tests {
         sent.lock().await.insert(event_id.clone());
 
         let in_reply_to = matrix_sdk::ruma::events::relation::InReplyTo::new(event_id);
-        let relates_to: Option<Relation<RoomMessageEventContentWithoutRelation>> =
-            Some(Relation::Reply { in_reply_to });
+        let relates_to: Option<Relation<RoomMessageEventContentWithoutRelation>> = Some(
+            Relation::Reply(matrix_sdk::ruma::events::relation::Reply::new(in_reply_to)),
+        );
 
         assert!(is_reply_to_bot(relates_to.as_ref(), &sent).await);
     }
@@ -231,8 +232,9 @@ mod tests {
         let in_reply_to = matrix_sdk::ruma::events::relation::InReplyTo::new(
             "$other:example.com".parse::<OwnedEventId>().unwrap(),
         );
-        let relates_to: Option<Relation<RoomMessageEventContentWithoutRelation>> =
-            Some(Relation::Reply { in_reply_to });
+        let relates_to: Option<Relation<RoomMessageEventContentWithoutRelation>> = Some(
+            Relation::Reply(matrix_sdk::ruma::events::relation::Reply::new(in_reply_to)),
+        );
 
         assert!(!is_reply_to_bot(relates_to.as_ref(), &sent).await);
     }