Merge branch 'refactor/backend-architecture' into development

api/app/adapters/embedding/openai.py

@@ -0,0 +1,21 @@
+"""OpenAI embedding adapter — implements EmbeddingProvider port."""
+
+from openai import AsyncOpenAI
+
+
+class OpenAIEmbeddingProvider:
+    def __init__(self, api_key: str, model: str = "text-embedding-3-small"):
+        self._client = AsyncOpenAI(api_key=api_key) if api_key else None
+        self._model = model
+
+    async def embed_text(self, text: str) -> list[float]:
+        if not self._client:
+            return []
+        resp = await self._client.embeddings.create(input=[text], model=self._model)
+        return resp.data[0].embedding
+
+    async def embed_texts(self, texts: list[str]) -> list[list[float]]:
+        if not self._client or not texts:
+            return []
+        resp = await self._client.embeddings.create(input=texts, model=self._model)
+        return [item.embedding for item in sorted(resp.data, key=lambda d: d.index)]