feature/entra id authentication added

backend/app/models/schemas.py

@@ -22,3 +22,23 @@ class ChatResponse(BaseModel):
 class ProviderListResponse(BaseModel):
     providers: List[str]
     default: str
+
+
+# Auth schemas
+class AuthUrlResponse(BaseModel):
+    auth_url: str
+
+
+class AuthCallbackRequest(BaseModel):
+    code: str
+
+
+class UserResponse(BaseModel):
+    id: str
+    name: Optional[str] = None
+    email: Optional[str] = None
+
+
+class AuthCallbackResponse(BaseModel):
+    token: str
+    user: UserResponse