Bump protobuf to 25.5 (aka PyPi 4.25.5)

[bdraco]

Home Assistant currently uses protobuf==5.28.3 and only one major version ahead is technically supported so we seeing issues like home-assistant/core#129052 home-assistant/core#130169

Note that the problem only appears if C extensions are not working and protobuf falls back to the pure python version

[codspeed-hq]

CodSpeed Performance Report

Merging #992 will not alter performance

_{Comparing protobuf_4_bump (3242f7c) with main (0221118)}

Summary

✅ 2 untouched benchmarks

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (0221118) to head (3242f7c).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #992   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           17        17           
  Lines         2673      2673           
=========================================
  Hits          2673      2673           

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[hcjehg]

It seems this has failed on
@github-actions CI / py 3.12 on ubuntu-latest (skip_cython) (pull_request) Failing after 1m

:-)

[hcjehg]

It seems this still fails :-)
CI / py 3.12 on ubuntu-latest (skip_cython) (pull_request) Failing after 1m