[Feature] [KVCache] support attention_store kv cache backend (#5823)

* [feat] support attention_store kv cache backend

* [fix] fix codestyle

* [chore] optimize log

* [fix] fix write storage task

* [fix] fix read storage

* [fix] fix code conflict after merge develop

* [fix] fix cache bytes and read task token ids

* [chore] add model for cache transfer manager

* [chore] add some log

* [chore] remove launched_cache_manager_signal

* [fix] fix write_back_storage_task match_block_num condition

* [fix] fix swap_cost_time

* [ci] fix ci

* Update fastdeploy/engine/sched/resource_manager_v1.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update fastdeploy/cache_manager/cache_transfer_manager.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update fastdeploy/cache_manager/transfer_factory/mooncake_store/attention_store.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: Jiang-Jia-Jun <163579578+Jiang-Jia-Jun@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

docs/zh/online_serving/metrics.md

@@ -32,7 +32,7 @@
 | KV缓存 | `fastdeploy:gpu_hit_token_rate`           | Gauge     | token 级别 GPU 前缀缓存命中率   | 百分比   |
 | KV缓存 | `fastdeploy:prefix_cache_token_num`       | Counter   | 前缀缓存token总数           | 个   |
 | KV缓存 | `fastdeploy:prefix_gpu_cache_token_num`   | Counter   | 位于 GPU 上的前缀缓存 token 总数  | 个   |
-| KV缓存 | `fastdeploy:prefix_cpu_cache_token_num`   | Counter   | 位于 GPU 上的前缀缓存 token 总数  | 个   |
+| KV缓存 | `fastdeploy:prefix_cpu_cache_token_num`   | Counter   | 位于 CPU 上的前缀缓存 token 总数  | 个   |
 | KV缓存 | `fastdeploy:available_gpu_block_num`      | Gauge     | 缓存中可用的 GPU 块数量（包含尚未正式释放的前缀缓存块）| 个   |
 | KV缓存 | `fastdeploy:free_gpu_block_num`           | Gauge     | 缓存中的可用块数             | 个   |
 | KV缓存 | `fastdeploy:max_gpu_block_num`            | Gauge     | 服务启动时确定的总块数        | 个   |