Fix benchmark maintained aura selection (#18)

docs/ISSUE_18_MAINTENANCE_CAST_SELECTION.md

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+# Issue 18: maintenance cast selection
+
+The benchmark controller scores a generic candidate list alongside the shared
+rotation. A maintained aura rejected by the shared selector must also be
+removed from that fallback list, or the next benchmark decision can cast it
+again.
+
+Current, unexpired auras are passed to the selector with their actual target
+and aura ID. The selector suppresses the same applied aura only on the target
+the candidate would use. An aura on another actor does not block the cast, and
+a different aura in the same exclusive group remains eligible to replace it.
+Expired and dispelled auras are absent from the active snapshot. Periodic
+effects retain their source, target, and remaining-duration checks. An attack
+or heal that also applies an aura remains eligible for its primary effect.
+
+Focused regressions cover Protection Paladin L60 Greater Blessing of Sanctuary,
+RoM Scout L30 Detection, target-scoped aura selection, and exclusive-group
+replacement. Run them with:
+
+```sh
+./node_modules/.bin/vitest run src/game/benchmark/benchmarkController.maintenance.test.ts src/game/combatRotation.test.ts --reporter=dot
+```