chore: initialize project repository

app/infrastructure/vector_memory.py

@@ -0,0 +1,28 @@
+from typing import Any, Protocol
+
+
+class VectorClient(Protocol):
+    def search(self, collection_name: str, data: list[list[float]], limit: int) -> Any: ...
+
+
+class VectorSearchResult:
+    def __init__(self, hits: Any, degraded: bool = False) -> None:
+        self.hits = hits
+        self.degraded = degraded
+
+
+class VectorMemoryAdapter:
+    def __init__(self, client: VectorClient, collection: str) -> None:
+        self.client = client
+        self.collection = collection
+
+    def search(self, embedding: list[float], limit: int = 10) -> VectorSearchResult:
+        try:
+            hits = self.client.search(
+                collection_name=self.collection,
+                data=[embedding],
+                limit=max(1, min(limit, 100)),
+            )
+            return VectorSearchResult(hits)
+        except Exception:
+            return VectorSearchResult([], degraded=True)