### What problem does this PR solve?
This PR fixes a bug where `layout_recognize="<name>@OpenDataLoader"` was
misrouted and then failed during parsing in the naive parser path. It
now routes correctly to OpenDataLoader and avoids passing unsupported
arguments that caused runtime errors. fixes#14572
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
Add PaddleOCR as a new PDF parser.
### Type of change
- [x] New Feature (non-breaking change which adds functionality)