fix(gate-57): drop the caller-less cascade-delete wrapper

lib/Service/DashboardVersionService.php

@@ -527,6 +527,18 @@ public function restoreVersion(
 		];
 	}//end restoreVersion()
 
+	/*
+	 * NO CASCADE-DELETE WRAPPER HERE.
+	 *
+	 * This service used to carry `deleteVersionsForDashboard()`, a literal
+	 * pass-through to `DashboardVersionMapper::deleteByDashboardUuid()`. It
+	 * never had a caller: the live cascade path is `VersionsListener`, which
+	 * is registered against `DashboardDeletedEvent` in `Application.php`
+	 * (REQ-CSC-002) and calls the mapper directly, inside the
+	 * log-and-continue envelope REQ-CSC-006 requires. Routing that listener
+	 * through a second wrapper would add a hop and nothing else.
+	 */
+
 	/**
 	 * Whether the supplied dashboard is groupfolder-backed
 	 * (REQ-VERS-008). Currently always false because the groupfolder

openspec/specs/dashboard-versioning/spec.md

@@ -372,7 +372,7 @@ The system MUST degrade gracefully when version storage is unavailable, returnin
 
 ### Schema and storage
 - Migration `Version001015Date20260502130000` creates `oc_launchpad_dash_versions` via `DashboardVersionTableBuilder::create()` with columns `id` (BIGINT PK), `dashboard_uuid` (STRING(36)), `version_number` (BIGINT), `snapshot_json` (TEXT — MEDIUMTEXT on MySQL), `created_by` (STRING(64)), `created_at` (DATETIME), `note` (STRING(500) nullable). Indexes: `launchpad_dvers_uuid_num` UNIQUE on `(dashboard_uuid, version_number)` and `launchpad_dvers_uuid_ts` on `(dashboard_uuid, created_at)`.
-- Cascade cleanup: `DashboardVersionMapper::deleteByDashboardUuid()` and `DashboardVersionService::deleteVersionsForDashboard()` are wired and ready for the sibling cascade-events listener; the dashboard delete path itself does not yet invoke them (future work alongside `dashboard-cascade-events`).
+- Cascade cleanup: `DashboardVersionMapper::deleteByDashboardUuid()` is invoked by `Listener\VersionsListener`, registered against `DashboardDeletedEvent` in `Application.php` per `dashboard-cascade-events` REQ-CSC-002/REQ-CSC-003. There is deliberately no service-layer wrapper for it — the listener owns the log-and-continue envelope REQ-CSC-006 requires, and a pass-through would add a hop with no caller.
 
 ### Deferred / future work
 - REQ-VERS-007 (Activity events): NC `IActivityManager::publish()` integration deferred. `DashboardVersionService::restoreVersion()` already stamps the dashboard `updatedAt` so audit consumers can pick the change up via the existing dashboard mtime; full activity provider registration tracked as a follow-up.

tests/Unit/Service/DashboardVersionServiceTest.php

@@ -545,18 +545,6 @@ public function testAdminMayRestoreOtherUsersDashboard(): void {
 		$this->assertSame(1, $result['version']->getVersionNumber());
 	}//end testAdminMayRestoreOtherUsersDashboard()
 
-	/**
-	 * Cascade cleanup delegates to the mapper.
-	 *
-	 * @return void
-	 */
-	// The cascade delete is covered where it actually happens, in
-	// tests/Unit/Listener/VersionsListenerTest.php. DashboardVersionService
-	// used to carry a deleteVersionsForDashboard() wrapper around the same
-	// single mapper call; nothing in production ever reached it, because
-	// VersionsListener — which IS registered on DashboardDeletedEvent — calls
-	// the mapper directly. This test was the wrapper's only caller anywhere.
-
 	// =========================================================================
 	// WF1: restoreVersion transaction envelope (wave-12 regression tests)
 	// =========================================================================

tools/spec-annotations-allowlist.txt

@@ -539,7 +539,6 @@ OCA\LaunchPad\Service\DashboardVersionService::listVersions
 OCA\LaunchPad\Service\DashboardVersionService::fetchSnapshot
 OCA\LaunchPad\Service\DashboardVersionService::createExplicitSnapshot
 OCA\LaunchPad\Service\DashboardVersionService::restoreVersion
-OCA\LaunchPad\Service\DashboardVersionService::deleteVersionsForDashboard
 OCA\LaunchPad\Service\DashboardVersionService::isGroupfolderBacked
 OCA\LaunchPad\Service\DemoShowcasesService::setDataDirForTesting
 OCA\LaunchPad\Service\DemoShowcasesService::getDataDir