[IRIT-able]

Summary

This PR adds end-to-end Bosch MRR radar VIN learning, support for physically inverted (upside-down) radar mounts with a reboot prompt, and resolves multiple timing and state issues in the Comma Pedal calibration tool for Tesla Pre-AP vehicles.

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Changes

1. Bosch Radar VIN Learning

• Tool (vin_learn_radar.py): Automates Gateway CAN feed spoofing (0x405 / 0x398) to program donor vehicle VIN and configuration data into retrofit Bosch radars.
• Dynamic Configuration: Reads the configured NAPRadarPosition directly from openpilot Params and sets the appropriate 2WD/AWD drive-type bits dynamically to prevent radar configuration mismatch DTCs.
• UI Integration: Added a one-touch "VIN Learn Radar" button under Settings → Radar.

2. Invert Radar Orientation (Upside-Down Mount Support)

• UI Toggle: Added "Invert Radar Orientation (Upside Down)" under Settings → Radar with an automatic reboot prompt upon change.
• Coordinate Inversion: Corrects both lateral position (yRel = -yRel) and lateral velocity (yvRel = -yvRel) in radar_interface.py to ensure stable tracking when the radar is mounted inverted.

3. Comma Pedal Calibration Fixes

• Panda Heartbeat Keepalive: Added send_heartbeat(False, False) calls to transport.py during pedal calibration to prevent modern Panda safety firmware from dropping into SAFETY_SILENT after 1 second.
• Interceptor State Check: Fixed a bug in calibrate_pedal.py where active throttle actuation (pedal_interceptor_state == 1) in Stage 3 (Detecting Pedal Max) was treated as a fault, eliminating the false "Pedal communication timeout" error.

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Verification & Testing

• Tested live on Comma 3X on a Tesla Model S Pre-AP.
• Verified radar VIN learning successfully pairs the radar without GTW DTCs.
• Verified tracks mirror accurately on the Radar HUD when the upside-down toggle is enabled.
• Verified Comma Pedal calibration completes all stages successfully without Panda watchdog timeouts.