Add test for endpoint initialization failure

[TheJulianJES]

Proposed change

This adds a small test for endpoint initialization failure here:

zha/zha/zigbee/device.py

Lines 995 to 996 in 5848461

	except Exception: # pylint: disable=broad-exception-caught
	self.debug("Failed to initialize endpoint", exc_info=True)

Needed for code coverage in below PR (since a surrounding line is touched by that PR):

• Entity recomputation and add/remove at runtime #517

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.64%. Comparing base (47f7048) to head (264092e).
⚠️ Report is 2 commits behind head on dev.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev     #719      +/-   ##
==========================================
+ Coverage   97.62%   97.64%   +0.01%     
==========================================
  Files          62       62              
  Lines       10950    10951       +1     
==========================================
+ Hits        10690    10693       +3     
+ Misses        260      258       -2     

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[Copilot]

Pull request overview

Adds a regression/unit test to exercise the Device.async_initialize() code path that catches and logs exceptions raised during per-endpoint initialization, improving coverage for the endpoint-initialization failure branch.

Changes:

• Add an async test that patches an endpoint’s async_initialize to raise and then calls zha_device.async_initialize(from_cache=True).

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