The XUSB manager's `handle` dropped `GamepadEvent::Arrival` via a `let else`, so
the GameStream path never created the pad until the first `State` and missed the
first XInput poll. Match on the event and `ensure` eagerly on Arrival, mirroring
the DualSense backend. Also refresh `last_active` on create and unplug so a
freshly-created pad's residual-rumble idle clock starts fresh rather than
inheriting a stale Instant (which could force off a legitimate rumble at once).
Verified: Windows .173 `cargo clippy -p punktfunk-host --all-targets -- -D warnings` (green).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
enricobuehler
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