Re-init serial connection on SerialException

[mickkn]

Added re-init on SerialException.

This fix will re-init the TCP connection when using a Socket UART, and the connection was lost (mainly on Wi-Fi)

It will not make a new write after re-init, so the next reading is done after 3600s - maybe consider this - but I don't see a big issue since next write/reading will just be a higher value from the meter.

This might also have to be tested with normal UART hardware, to see if it mess something up :)

[codecov]

Codecov Report

Attention: Patch coverage is 70.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 77.65%. Comparing base (0b30845) to head (304c2d0).

Files with missing lines	Patch %	Lines
...tom_components/kamstrup_403/pykamstrup/kamstrup.py	70.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #128      +/-   ##
==========================================
- Coverage   77.83%   77.65%   -0.19%     
==========================================
  Files           8        8              
  Lines         361      367       +6     
==========================================
+ Hits          281      285       +4     
- Misses         80       82       +2     

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