feat(webapp): support telemetry activation for legacy vehicles without virtual key (pre-2021 Model S/X MCU2)

[abarghoud]

Summary

On legacy vehicles (such as 2017 Tesla Model X / Model S equipped with MCU2 Infotainment Upgrade), Tesla does not support or require Virtual Key pairing (Vehicle Command Protocol).
When users open the virtual key pairing URL (tesla.com/_ak/...), the official Tesla mobile app shows the following popup:

"L'accès à un tiers ne peut être fourni — Vous n'avez pas besoin de paramétrer une clé virtuelle pour ce véhicule"

However, in the SentryGuard webapp onboarding wizard (TelemetryActivationStep.tsx), the telemetry activation toggle switches are currently disabled when vehicle.key_paired === false:

disabled={isVehicleUpdating(vehicle.vin) || vehicle.key_paired === false}

This prevents owners of legacy vehicles with MCU2 (who are capable of streaming telemetry via firmware 2025.20+ with the in-car "Allow Third-Party App Data Streaming" toggle enabled) from activating telemetry on SentryGuard.

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Proposed Changes

1. Webapp (TelemetryActivationStep.tsx):

   • Do not disable telemetry activation toggles solely because key_paired === false.
   • Update the UI banner/warning to reflect that virtual keys are not required for legacy pre-2021 Model S/X vehicles.

2. Mobile (OnboardingScreen.tsx / onboarding.helpers.ts):

   • Ensure onboarding steps do not block users or misclassify vehicles as invalid when key_paired === false.

3. Backend / Telemetry Service:

   • Verify if any telemetry setup checks require bypassing key_paired validation for vehicles where vehicle_command_protocol_required === false.

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Context / References

• Tesla Fleet API docs: GET /api/1/vehicles/{vin}/fleet_status returns vehicle_command_protocol_required: false for pre-2021 Model S/X.
• Firmware 2025.20+ enables Fleet Telemetry on MCU2 legacy vehicles via Safety > Allow Third-Party App Data Streaming without a virtual key.

[abarghoud]

4. Documentation / FAQ:
   • Update the FAQ in the documentation and Webapp to explain the virtual key behavior for legacy Model S/X vehicles (MCU1 / MCU2) and provide guidance when the Tesla app shows 'Vous n'avez pas besoin de paramétrer une clé virtuelle pour ce véhicule'.