[groupsky]

Summary

A read whose answer has the wrong number of data bytes is now a failed request, so withRetry sends it again in the same poll, like after a timeout or a CRC error. Before, the short buffer went to the driver, the decoder threw, and the whole poll failed (an OR-WE-514 sent 1 data byte for a 2-register read, 4 times in 23 hours).

Changes

• New internal checkLength (packages/transport/src/answer-length.ts): register reads expect count × 2 bytes, coil and discrete-input reads expect ceil(count / 8) bytes.
• Used inside the retried function of all four reads in both createModbusTransport (CLI, profiler) and SlaveTransport (the MQTT bridge, through TransportManager).
• Error: Wrong answer length: expected 4 data bytes, got 1. withRequestContext appends the port, slave, function, address and count, e.g. (… 9600 8N1, slave 2, FC03 read holding registers, address 0 (0x0000), count 2).
• modbus-serial 8.0.25 already checks the whole frame length, so a good answer always matches; only a byte-count byte that disagrees with the frame is rejected.

Checklist

• Tests added/updated for new functionality: for both transports and all four reads, "short once, then good → good after one retry" and "always wrong → rejects with the message"
• Documentation updated (if applicable): not needed

Closes #673

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@ya-modbus/cli

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@ya-modbus/device-profiler

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@ya-modbus/driver-or-we-514

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@ya-modbus/driver-or-we-516

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@ya-modbus/driver-sdk

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@ya-modbus/emulator

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@ya-modbus/mqtt-bridge

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@ya-modbus/transport

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ya-modbus

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ya-modbus-bridge

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ya-modbus-emulator

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ya-modbus-profile

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commit: 0399c95