fix(input-plumber): log + retry the boot-time wake-button reload

[srsholmes]

Problem

The overlay wake button — a physical button bound through InputPlumber (e.g. the handheld's Keyboard button → F16) — is re-applied on every boot by reloadPersistedProfile(). When that reload fails, the button silently reverts to its OS default (opening the on-screen keyboard), and there were almost no diagnostics to explain why:

• reloadPersistedProfile() had no internal logging.
• onLoad only logged on failure, and did a single attempt.

Two real failure modes hit this:

1. Stale saved capability after an InputPlumber update (observed: SteamOS 3.9 / build 20260630 bumped IP to 0.77.7). The old saved capability string no longer matched the device, so the reload restored nothing. Re-capturing the button fixes it — but that's invisible without logs.
2. Cold-boot race: IP is up (so the internal waitForIp passes) but the composite device isn't enumerated yet → reloadPersistedProfile() returns "Bound device not connected" and the binding is dropped for the whole session.

Changes

• Logging in reloadPersistedProfile() (non-Deck path): binding read, IP-up + device list, whether the saved capability is still present in the device's capabilities (catches post-update renames), and the LoadProfilePath result. Also log when a binding is persisted at bind time.
• Retry in onLoad: reload is retried up to 5× (2s apart), mirroring the existing restartInputPlumber() retry, so the cold-boot enumeration race can't silently drop the binding. No-op when nothing is bound (early ok return).

Diagnose

journalctl -u loadout.service -b --no-pager | grep "wake reload"

Verification

Built and installed on a OneXPlayer APEX (non-Deck). A real cold reboot logs the full happy path and restores the binding:

wake reload: restoring binding raw="Gamepad:Button:Keyboard" device="ONEXPLAYER APEX"
wake reload: IP up, 1 composite device(s): [ONEXPLAYER APEX]
wake reload: applying to device "ONEXPLAYER APEX" … saved cap "Gamepad:Button:Keyboard" present
wake reload: LoadProfilePath OK — wake button "Gamepad:Button:Keyboard" restored

Typecheck clean; input-plumber lib tests pass (67). The app.spec.tsx render tests were already failing on main (pre-existing, unrelated).

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