v392_update

-- dev at time of v3.9.2 --
included 382429d9 Prepare 3.9.2.
included 59f03962 Reactivate simulator validate. (#2643)
included e342eb57 Don't bool-test explicit datastores (#2638)
included 6d81ee35 Test and hard delayed response test. (#2636)
included 8a901e5a Update simulator doc. (#2635)
WAITING  968564c0 Bit handling LSB -> MSB across bytes. (#2634)
included 4fc8ff67 Prepare dev.
-- dev at time of v3.9.1 --
included 3a3edf11 Prepare 3.9.1. (#2632)
included 3f65d2a8 Correct byte order in bits. (#2631)
included 6c9c0a65 Prepare dev.
included Correct bit handling internally and in API. (#2627)
included d0d2cbe8 default argument  ModbusSequentialDataBlock (#2622)
included 0b94011c Fix exception error message for decoding response (#2618)
included ffa0da61 Expose exception_code to API. (#2615)
included 33a21ad5 Simplify ruff config (#2611)
included 79cc58cc Documentation dont fixed. (#2605)
included 52b852f4 sum() can operate on an Iterator directly (#2610)
included  db4b933a SimData update. (#2601)
WAITING  2f87de98 Change slave to device_id and slave= to device_id=. (#2600)
included 9432d2b9 Officially working towards 4.0.0
WAITING  feeb36b8 Remove payload. (#2524)
included 748d4edc Start<x>Server custom_functions -> custom_pdu.