Arrival Board U1.0

Purpose
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Project UNION based ESP32 arrival board.

Important
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This documentation accompanies the supplied project.
The source code has not been modified.

Developer checklist
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- Install ESP32 board support.
- Install required Project UNION libraries.
- Verify hardware against the wiring diagram.
- Compile and test on one device before deployment.

Any inconsistencies found during review will be reported, not corrected automatically.