wtmpdb-rotate.timer shows as failed (cosmetic)

Debian 13 template references wtmpdb-rotate.timer but the unit file doesn't exist. `systemctl is-system-running` reports degraded. Cosmetic only — ignore it.

Don't chase this as a nesting or config issue. All real services run fine. Discovered during Caddy deployment (2026-02-27).
Affected entities:Caddy