P2-24 ADC reference/scaling rules consistency (end-to-end)

[Kinin-Code-Offical]

(Synced from docs/current_status/issue_ready_backlog.md)\n\n# P2-24 ADC reference/scaling rules consistency (end-to-end)\n\nSummary

• Area: firmware integration
• Deliverable: consistent AREF behavior; document 0..1023 mapping.

Acceptance Criteria

• ADC input scaling is consistent across backends.
• AREF assumptions are documented.

Test Plan

• Known analog voltage sweep; verify digital readings match expected mapping.

Likely File Targets

• FirmwareEngine ADC implementation
• NativeEngine/Unity analog mapping
• Docs

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[github-actions]

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