Add factory reset endpoint for stage environment cleanup (#54)

backend/app/storage.py

@@ -835,6 +835,36 @@ class S3Storage:
         except ClientError:
             return False
 
+    def delete_all(self) -> int:
+        """
+        Delete all objects in the bucket.
+
+        Returns:
+            Number of objects deleted
+        """
+        deleted_count = 0
+        try:
+            paginator = self.client.get_paginator("list_objects_v2")
+            for page in paginator.paginate(Bucket=self.bucket):
+                objects = page.get("Contents", [])
+                if not objects:
+                    continue
+
+                # Delete objects in batches of 1000 (S3 limit)
+                delete_keys = [{"Key": obj["Key"]} for obj in objects]
+                if delete_keys:
+                    self.client.delete_objects(
+                        Bucket=self.bucket, Delete={"Objects": delete_keys}
+                    )
+                    deleted_count += len(delete_keys)
+                    logger.info(f"Deleted {len(delete_keys)} objects from S3")
+
+            logger.info(f"Total objects deleted from S3: {deleted_count}")
+            return deleted_count
+        except ClientError as e:
+            logger.error(f"Failed to delete all S3 objects: {e}")
+            raise
+
     def generate_presigned_url(
         self,
         s3_key: str,