Exception on device discovery in DIY mode

[martink-p]

(At least) when in DIY mode an exception is raised due to a key error in the "device" dictionary:

2024-10-31 15:13:28.408 DEBUG (MainThread) [custom_components.sonoff.core.ewelink.local] 100214ec65 <= Local0 | Zeroconf error
Traceback (most recent call last):
File "/config/custom_components/sonoff/core/ewelink/local.py", line 135, in _handler2
self._handler3(deviceid, host, data)
File "/config/custom_components/sonoff/core/ewelink/local.py", line 161, in _handler3
self.dispatcher_send(SIGNAL_UPDATE, msg)
File "/config/custom_components/sonoff/core/ewelink/base.py", line 65, in dispatcher_send
handler(*args, **kwargs)
File "/config/custom_components/sonoff/core/ewelink/__init__.py", line 290, in local_update
device["params"]["sledOnline"] = params["sledOnline"]
KeyError: 'params'

I added some code above line 290 which fixed the issue. Due to the fact I'm not involved in the project, I'm not sure this is the correct set of variables and if it is the only location the fix is required.

if "params" not in device:                                                     
    device["params"] = params                                                  
 elif "sledOnline" in params:                                                   
    device["params"]["sledOnline"] = params["sledOnline"] 

Please check my suggestion.