code: def dict_deep_merge(tgt, src):
      
      for k, v in src.items():
          if k in tgt:
              if isinstance(tgt[k], dict) and isinstance(v, dict):
                  dict_deep_merge(tgt[k], v)
              else:
                  tgt[k].extend(deepcopy(v))
          else:
              tgt[k] = deepcopy(v)
docs: Utility function to merge the source dictionary `src` to the target
      dictionary recursively
  
      Note:
          The type of the values in the dictionary can only be `dict` or `list`
  
      Parameters:
          tgt (dict): The target dictionary
          src (dict): The source dictionary