fix(win32): handle missing asyncio protocol methods in _MethodProxy

[HiDiHo01]

On Windows, when a serial port closes or disconnects, asyncio's proactor event loop calls eof_received() on the transport's protocol. _MethodProxy looks this up via getattr from a fixed _mapping dict, but eof_received is not in that mapping, so a KeyError is raised: Fatal error: protocol.eof_received() call failed.
...
File ".../serialx/platforms/serial_win32.py", line 434, in getattr
return self._mapping[name]
KeyError: 'eof_received'
This surfaces as a noisy Fatal error log on every HA shutdown/restart cycle when a Zigbee or other serial device is connected on Windows.

[puddly]

Thanks for the PR. I think it would be better to just proxy eof_received, no?

[HiDiHo01]

Fair point — it's more explicit and doesn't silently swallow arbitrary unknown attribute access. The correct behaviour for eof_received on a serial transport is to return False (meaning "don't keep the connection half-open"), which is what asyncio.Protocol.eof_received() does by default.

So the mapping entry would be:

"eof_received": lambda: False,

That's more honest than a catch-all no-op: it documents exactly which asyncio protocol method was missing and returns the semantically correct value rather than None.

Update the PR description accordingly — replace the proposed __getattr__ change with just adding "eof_received" to _mapping, and note the return value rationale.

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 92.16%. Comparing base (f9f1bf2) to head (071bd15).

Files with missing lines	Patch %	Lines
serialx/platforms/serial_win32.py	50.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev      #97      +/-   ##
==========================================
- Coverage   92.23%   92.16%   -0.08%     
==========================================
  Files          22       22              
  Lines        3632     3637       +5     
==========================================
+ Hits         3350     3352       +2     
- Misses        282      285       +3     

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[puddly]

Thanks!