swaits
30331d5204
ROOT CAUSE: postcard encodes u8 and i8 as raw bytes, NOT varint/zigzag. The Python encoders used varint() for u8 and zigzag() for i8. For small values this was silently correct (varint(7) == raw byte 7), but for tx_power_dbm: zigzag(14) = 28, which the new validation correctly rejected as out of range (-9..22). This was a pre-existing bug masked by the absence of validation. Fix all RadioConfig field encoders in both donglora.py and meshcore_rx.py. Fix docs/PROTOCOL.md to correctly document i8 as raw byte, not zigzag. Restore full config validation.