Stale To-Do in vLLM/app.py for supporting prompt + generation token IDs

In responses_api_models/vllm_model/app.py, on line 251, there is a block of code that has a TODO regarding adding support for getting generation and prompt token IDs using the flag return_tokens_ids=True. The TODO mentions the upgrade should be done once NeMo RL upgrades to vLLM 0.10.2. NeMo RL is already on 0.17.1.

if self.config.return_token_id_information:
            body_dict |= dict(
                logprobs=True,
                # Typically passed via OpenAI client extra_body.
                return_tokens_as_token_ids=True,
                # TODO add this when NeMo RL upgrades to vLLM 0.10.2 support for prompt token ids
                # For prompt and generation token IDs
                # return_token_ids=True,
                # For prompt token IDs
                # prompt_logprobs=0,
            )

Start in responses_api_models/vllm_model/app.py at line 251 and compare the current vLLM and NeMo RL versions with the commented token-ID options. Check how return_token_id_information is handled and run the relevant model tests if available. Done means the stale TODO is addressed and the requested prompt and generation token ID support is wired through.