2c0602e0e6
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根因: FeedbackCollector 用纯内存 HashMap 存储信任度记录，重启后归零。 修复: - FeedbackCollector 添加 viking: Option<Arc<VikingAdapter>> 字段 - 添加 with_viking() 构造器 - 添加 save(): 遍历 trust_records → MemoryEntry → VikingAdapter 存储 - 添加 load(): find_by_prefix 反序列化回 HashMap - EvolutionEngine::new()/from_experience_store() 传入 VikingAdapter - submit_feedback() 改为 async，提交后自动调用 save() - 添加 load_feedback() 供启动时恢复 测试: save_and_load_roundtrip + load_without_viking + save_without_viking