Phase 5 re-validation caught a functional regression: the V-10 clamp in
SearchService.SearchAsync also capped CleanupService's internal target resolution
(pageSize 10000 -> 200), silently limiting bulk cleanup-by-query to 200 emails.
The clamp belongs at the user-facing trust boundary, not the shared service: move
MaxPageSize (200) enforcement into SearchController (both the POST body and GET query
paths). Internal callers of ISearchService now request large pages unhindered, while
user requests are still bounded. Adds a regression test proving SearchService returns
a 250-row page uncapped. No security regressions per Phase 5. All 39 tests green.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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