Adds 5 dedicated controller cases — paging fields exposed on the JSON,
rejections for size>100 / size<1 / page<0 / page>100000, and a
captor assertion that the built PageRequest is forwarded to the service.
The size>100 case is the load-bearing guard on @Validated at
DocumentController — removing the annotation silently reopens the DoS
window this PR is meant to close.
Adds 5 service cases — fast path uses findAll(Spec, Pageable) (not Sort),
propagates page+size to the DB, carries totalElements/totalPages/
pageNumber/pageSize back on the result, and for SENDER sort slices in
memory and reports the pre-slice total. Page-beyond-last returns empty
content with a correct totalElements (JPA edge case). (#315)
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
826c0827dc