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/run.rs

@@ -92,7 +92,9 @@ pub async fn run_bot(
     {
         use matrix_sdk::ruma::api::client::uiaa;
         let password_auth = uiaa::AuthData::Password(uiaa::Password::new(
-            uiaa::UserIdentifier::UserIdOrLocalpart(config.username.clone().unwrap_or_default()),
+            uiaa::UserIdentifier::Matrix(uiaa::MatrixUserIdentifier::new(
+                config.username.clone().unwrap_or_default(),
+            )),
             config.password.clone().unwrap_or_default(),
         ));
         if let Err(e) = client