perf(crashpad): Send event updates over IPC

[jpnurmi]

Pass crash event, breadcrumbs, and external crash report updates to the Crashpad client and let it decide between IPC (Windows) or direct file writes (Unix).

According to local benchmarks with Windows Defender exclusions, it shaves off ~50% on Windows:

Before

tests/benchmark.py::test_benchmark_scope[crashpad-set_tag] PASSED
Min 1.177ms, Max 1.177ms, Mean 1.177ms, Median 1.177ms

After

tests/benchmark.py::test_benchmark_scope[crashpad-set_tag] PASSED
Min 0.570ms, Max 0.570ms, Mean 0.570ms, Median 0.570ms

For users with Windows Defender enabled, occasional scan delays are avoided in the client process, and savings therefore can be significantly more.

Depends on:

• perf: add API for updating attachments crashpad#157

[codecov]

Codecov Report

❌ Patch coverage is 58.69565% with 19 lines in your changes missing coverage. Please review.
✅ Project coverage is 75.74%. Comparing base (b742b8d) to head (b02b89a).
⚠️ Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1841      +/-   ##
==========================================
- Coverage   75.76%   75.74%   -0.03%     
==========================================
  Files          92       92              
  Lines       21989    22023      +34     
  Branches     3918     3924       +6     
==========================================
+ Hits        16661    16681      +20     
- Misses       4447     4457      +10     
- Partials      881      885       +4     

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

^{❌ Bugbot Autofix is OFF. To automatically fix reported issues with cloud agents, enable autofix in the Cursor dashboard.}

^{Reviewed by Cursor Bugbot for commit ea01e18. Configure here.}