Method attention_kv_required

examples/server/server.py:12636–12641

(
        prompt_kv: int,
        reused_kv: int,
        generation_kv: int,
    )

    @staticmethod
    def attention_kv_required(
        prompt_kv: int,
        reused_kv: int,
        generation_kv: int,
    ) -> int:
        return prompt_kv - reused_kv + generation_kv

    def try_set_sequence_cache_match(
        self,