feat: add avatars

src/application/contracts/i_s3.py

@@ -0,0 +1,9 @@
+from __future__ import annotations
+
+from typing import Protocol, runtime_checkable
+
+
+@runtime_checkable
+class IS3(Protocol):
+    async def upload_bytes(self, *, key: str, body: bytes, content_type: str) -> str:
+        ...