trovis-modbus 3.1.0

trovis-modbus 3.1.0

This release improves Modbus write reliability and updates the library for the
current modbus-connection 4.12.x API.

Write reliability

• Add verified writes for normal state-setting registers and coils.
• After a write, read back the affected datapoint and update the local cache
  only after successful verification.
• On a lost write response, perform a targeted readback first instead of
  immediately repeating the write, avoiding unnecessary duplicate writes when
  the controller has already accepted the value.
• Retry failed or mismatching normal writes up to two times.
• Add the public TrovisWriteVerificationError for writes that cannot be
  verified successfully.
• Apply the same write/readback verification to the TROVIS write-access
  register.

Safety

• Explicitly mark one-shot command/trigger datapoints as non-retryable where
  repeating the command could have unintended effects.
• In particular, forced_charging remains non-retryable because the exact
  controller behavior of repeated trigger writes is not sufficiently defined.

Modbus connection

• Require modbus-connection >= 4.12.1, <5.
• Use the current ModbusUnit timing-requirement API.
• Request a 5 s connection timeout and 0 s connect delay for TROVIS
  communication.
• Update tests and mocks for the current modbus-connection API.

No intentional breaking changes are introduced to the public TROVIS device
model.