feat(queue): Register insights-queue-dashboard-migration feature flag (#109332)

Register the `insights-queue-dashboard-migration` feature flag in the
temporary features registry.

This follows the same pattern as the existing insight module migration
flags (web vitals, frontend overview, frontend assets) and will be used
to gate the queue module's platformized prebuilt dashboard experience
behind a Flagpole-controlled rollout.

Co-authored-by: Claude <noreply@anthropic.com>

Author: DominikB2014

src/sentry/features/temporary.py

@@ -238,6 +238,8 @@ def register_temporary_features(manager: FeatureManager) -> None:
     manager.add("organizations:insights-web-vitals-dashboard-migration", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=True)
     # Enable frontend overview dashboard on dashboards platform
     manager.add("organizations:insights-frontend-overview-dashboard-migration", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=True)
+    # Enable queue dashboard on dashboards platform
+    manager.add("organizations:insights-queue-dashboard-migration", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=True)
     # Enable frontend assets dashboard on dashboards platform
     manager.add("organizations:insights-frontend-assets-dashboard-migration", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=True)
     # Enable Next.js frontend overview dashboard on dashboards platform