Fix SSE route dependency and align architecture docs

backend/app/infrastructure/storage/minio_binary_store.py

@@ -0,0 +1,47 @@
+"""Implement infrastructure support for minio binary store."""
+
+from __future__ import annotations
+
+from app.domain.documents import DocumentBinaryStore
+from app.services.storage.minio_client import MinIOClient
+# Keep adapter behavior explicit so integration details remain easy to audit.
+
+
+
+class MinioDocumentBinaryStore(DocumentBinaryStore):
+    """Provide the Minio Document Binary Store store implementation."""
+    def __init__(self) -> None:
+        """Initialize the Minio Document Binary Store instance."""
+        self.client = MinIOClient()
+        self.client.connect()
+        self.client.ensure_bucket()
+
+    def save(
+        self,
+        *,
+        object_name: str,
+        data: bytes,
+        content_type: str,
+        metadata: dict[str, str] | None = None,
+    ) -> None:
+        """Handle save for the Minio Document Binary Store instance."""
+        success = self.client.upload_bytes(
+            data=data,
+            object_name=object_name,
+            content_type=content_type,
+            metadata=metadata,
+        )
+        if not success:
+            raise RuntimeError("MinIO 保存失败")
+
+    def read(self, object_name: str) -> bytes:
+        """Handle read for the Minio Document Binary Store instance."""
+        data = self.client.get_object_data(object_name)
+        if data is None:
+            raise FileNotFoundError(f"对象不存在: {object_name}")
+        return data
+
+    def delete(self, object_name: str) -> None:
+        """Handle delete for the Minio Document Binary Store instance."""
+        if not self.client.delete_object(object_name):
+            raise FileNotFoundError(f"对象删除失败: {object_name}")