Init first files

backend/app/schemas/user.py

@@ -0,0 +1,23 @@
+from datetime import datetime
+from pydantic import BaseModel, EmailStr
+
+
+class UserOut(BaseModel):
+    id: int
+    email: EmailStr
+    role: str
+    created_at: datetime
+
+    model_config = {"from_attributes": True}
+
+
+class UserCreate(BaseModel):
+    email: EmailStr
+    password: str
+    role: str = "viewer"
+
+
+class UserUpdate(BaseModel):
+    email: EmailStr | None = None
+    password: str | None = None
+    role: str | None = None