Implement robust logging with flexi_logger and update CI to verify logs

src/ssh.rs

@@ -83,6 +83,8 @@ impl MudHandler {
             state.load_existing_player(self.id, saved, Some(channel), Some(handle));
             drop(state);
 
+            log::info!("Player '{}' (id={}) logged in", self.username, self.id);
+
             let msg = format!(
                 "{}\r\n",
                 ansi::system_msg("Welcome back! Your character has been restored.")
@@ -171,6 +173,13 @@ impl MudHandler {
             .map(|c| c.name.clone())
             .unwrap_or_default();
 
+        log::info!(
+            "New character created: {} (Race: {}, Class: {})",
+            self.username,
+            race_name,
+            class_name
+        );
+
         state.create_new_player(
             self.id,
             self.username.clone(),