initial

backend/app/schemas/common.py

@@ -0,0 +1,14 @@
+from pydantic import BaseModel
+
+
+class MessageResponse(BaseModel):
+    message: str
+
+
+class ErrorResponse(BaseModel):
+    detail: str
+
+
+class PaginationParams(BaseModel):
+    limit: int = 20
+    offset: int = 0