Refactor: thread-safe per-process state and add tests
Major changes:
- Move child state from global variable to server config (reqin_log_server_conf_t)
- Add reqin_log_create_server_conf() for proper per-server initialization
- Fix thread safety for worker/event MPMs
- Add cmocka unit tests (test_module_real.c)
- Add Python integration tests (test_integration.py)
- Update CI workflow and Dockerfiles for test execution
- Fix: Remove child_exit hook (not in architecture.yml)
Tests:
- Unit tests: JSON escaping, ISO8601 formatting, header truncation
- Integration tests: basic_logging, header_limits, socket_unavailable, socket_loss
Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>
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