Wave 9: fix audit findings, harden ABI, deduplicate config (W12.1-W12.6)

- W12.1 context_plugin (engineer-zhou): wrap C ABI surface in try/catch,
  add OOM-safe strdup_message_fields helper, make g_max_tokens drive
  message-count trim (option A).
- W12.2 config refactor (architect-lin): introduce
  plugins/config/include/toml_parse.h to eliminate 74-line parser
  duplication; config_plugin delegates to host->config_get/set,
  collapsing the dual-store data island; ConfigStore::get() now copies
  via thread_local std::string to remove c_str() dangling under
  concurrent set(). Zero ABI changes.
- W12.3 CLI command parsing (engineer-zhao): guard /clear and /context
  on missing session service; refactor /file dispatch so bare
  /file write hits usage instead of unknown-command.
- W12.4 build path unification (devops-hu): set per-target
  RUNTIME_OUTPUT_DIRECTORY on dstalk-cli; remove stale
  build/dstalk-cli/dstalk-cli.exe so build/bin/ is the sole binary.
- W12.5 STATUS.md auto-refresh (engineer-li): run W11.6 script to
  regenerate STATUS from live profile/group data.
- W12.6 plugin-abi.md (writer-deng): add §8 exception safety across
  ABI boundary and §9 string return lifetime; reference real
  audit-found violations as anti-examples.

Verified: cmake build 0 error 0 warning, ctest 4/4 pass.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

agents/engineer-li/profile.md

@@ -26,5 +26,8 @@ performance_log:
   - date: 2026-05-27
     event: "W11.6: 编写 scripts/refresh_status.py 自动扫描 agents/*/profile.md 重新生成 agents/STATUS.md，支持 --dry-run，Python 3.8+ 标准库零依赖"
     rating: completed
+  - date: 2026-05-27
+    event: "W12.5: 使用 scripts/refresh_status.py 重新生成 agents/STATUS.md (46行)，验证脚本对 W11.x (已 commit) 和 W12.x (in-flight) 数据正确解析，dry-run 确认 16 行表1 + 5 行表2 + 高水位 W11.7，build + ctest 全 PASS"
+    rating: completed
 current_groups: []
 ---