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- app/ports.py: 添加 EmbeddingProvider Protocol(runtime_checkable,dim 属性 + embed 方法) - adapters/embedding.py: 从参考代码迁移,拆分为 LocalEmbeddingProvider 和 RemoteEmbeddingProvider - Local: sentence-transformers 冻结推理,维度校验 - Remote: OpenAI 兼容 API,L2 归一化,按 index 排序 - 两者均提供 embed() 和 embed_tensor() 统一接口 - tests/unit/test_embedding_adapter.py: Protocol 满足性、形状校验、导入测试 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>