Add 'Client-Platform' header for server processing (#2657)

Co-authored-by: David S. Batista <dsbatista@gmail.com>

Author: Bobholamovic

integrations/paddleocr/src/haystack_integrations/components/converters/paddleocr/paddleocr_vl_document_converter.py

@@ -372,7 +372,7 @@ def _parse(self, data: bytes, file_type: FileType) -> tuple[str, dict[str, Any]]
 
         # Prepare headers with authentication
         access_token_value = self.access_token.resolve_value() if self.access_token else None
-        headers = {"Content-Type": "application/json"}
+        headers = {"Content-Type": "application/json", "Client-Platform": "haystack"}
         if access_token_value:
             headers["Authorization"] = f"token {access_token_value}"