[CLAUDE] Tests: close 3 HRM coverage gaps (S45)
Gap1 (CRITICAL) Holiday composite UNIQUE (Year,Date): Create/Update guard, self-update no false-positive, soft-delete exclusion. Gap2 EmployeeSatellite: 5x FK-invariant parent guard + soft-delete + cascade semantics + EF model cascade config. Gap3 gotcha #44 authz regression: HrmConfigsController (bare [Authorize] + writes Roles=Admin) + EmployeesController (class Policy Hrm_HoSo.Read + per-action). 154 -> 181 PASS (+27, Infra 96->123).
Surfaced drift (test-locked current behavior, fix pending): Holiday DB UNIQUE (Year,Date) NOT filtered by IsDeleted -> recreating on soft-deleted slot throws DbUpdateException(500) vs app-level !IsDeleted intent. Inconsistent with PE/Contract LevelOpinions filtered-unique pattern.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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