fix(pubsub): repeat ZSub's bounds on the generic accessor impl

ZSub declares T: ZMessage, S: ZDeserializer on the struct, so a bare
impl<T, Q, S> does not satisfy them.

Author: YuanYuYuan

crates/hiroz-tests/tests/message_lost.rs

@@ -20,9 +20,7 @@ use std::{
 
 use common::{TestRouter, create_hiroz_context_with_endpoint};
 use hiroz::{
-    Builder, GidArray, TypeHash,
-    attachment::Attachment,
-    event::ZenohEventType,
+    Builder, GidArray, TypeHash, attachment::Attachment, event::ZenohEventType,
     ros_msg::MessageTypeInfo,
 };
 use serde::{Deserialize, Serialize};

crates/hiroz/src/pubsub.rs

@@ -1019,7 +1019,7 @@ impl<T: ZMessage, Q, S: ZDeserializer> std::fmt::Debug for ZSub<T, Q, S> {
 /// needs to install an event callback, and the only way to observe
 /// [`MessageLost`](crate::event::ZenohEventType::MessageLost). Neither field has
 /// anything to do with the queue.
-impl<T, Q, S> ZSub<T, Q, S> {
+impl<T: ZMessage, Q, S: ZDeserializer> ZSub<T, Q, S> {
     /// The event manager this subscriber raises endpoint events on.
     pub fn events_mgr(&self) -> &Arc<Mutex<EventsManager>> {
         &self.events_mgr