This PR fixes an issue in the export logic where CSV downloads would
include duplicate rows and repeated column headers across paginated
batches.
Key changes:
- Ensured `page` is incremented correctly after each `payload.find` call
- Tracked and wrote CSV column headers only once for the first page
- Prevented row duplication by removing unused `result` initialization
and using isolated `page` tracking
- Streamlined both download and non-download logic for consistent batch
processing
This resolves incorrect row counts and header duplication in large CSV
exports.
5cf92878a4