feat(kv-ir): Add support for getting the number of log events read from the deserializer. (#1282)

Author: anlowee

components/core/src/clp/ffi/ir_stream/Deserializer.hpp

@@ -158,6 +158,14 @@ class Deserializer {
      */
     [[nodiscard]] auto get_metadata() const -> nlohmann::json const& { return m_metadata; }
 
+    /**
+     * @return The number of log events (log event IR units) that have been deserialized from the
+     * current stream.
+     */
+    [[nodiscard]] auto get_num_log_events_deserialized() const -> size_t {
+        return m_next_log_event_idx;
+    }
+
 private:
     // Factory function
     /**