[feat][evaluation] support async CustomRPC evaluators

[HearyShen]

背景

Trae Work 三方 CustomRPC 评估器耗时较长，需要通过 AsyncInvokeEvaluator 快速接单，由 Provider 异步上报最终结果，并恢复实验调度。

改动

• IDL/OpenAPI 为 CustomRPC evaluator 增加异步配置和 AsyncInvokeEvaluator SPI。
• 统一 AsyncRunEvaluator 的 Record -> Context -> Provider 顺序。
• terminal CAS 区分 Applied / Duplicate / Conflict。
• refs 持久化后 arm ResumeReady，callback 恢复实验调度。
• evaluator callback 恢复不重跑 Target，兼容 Agent evaluator 共用异步链路。
• FaaS HTTP 使用生成的标准 SPI request，不再维护私有 string i64 wire。
• 异步 callback 自动补算耗时时仅接受正值，避免 MySQL timestamp 秒精度舍入产生负耗时。
• 保持同步 CustomRPC、old protocol 与普通 evaluator 兼容。

2026-08-12 最终 PPE 验收

• OSS head：8741a167970c52527e84038fa7faa8d91cba286e，GitHub Checks 全绿。
• Commercial head：2bb98ef6461cec3eacf86c31de6b69f299d0a45a。
• Evaluation：stone.cozeloop.evaluation/default，SCM 1.0.0.4415，8C16G，HL/LF/LQ 各 1/1；工单 2087543570998784000 成功。外场 lane-default-fornax_commercial 仍为 1.0.0.4322。
• Direct async：RPC 7590117564433612802、FaaS 7590117563496652802、Agent 7590117563496653058 均从 Processing 收敛到 Success，耗时均非负。
• 核心调度：无 Target、同步 Target、异步 Target 均为 5/5 evaluator Success；Bench Agent 业务失败时其余 4 个 evaluator 仍全部 Success。
• Retry：无 Target 0 次 Target RPC/INSERT；同步 Target 每个 run 恰好 1 次 Target RPC/INSERT；callback 恢复不二次执行 Target。
• 协议矩阵：RPC/FaaS immediate、duplicate、conflict、failed、no-report 全覆盖；历史 RPC/FaaS 和同步 RPC/FaaS 正常。
• 容量：RPC 20/20、FaaS 200/200 Item/Turn/Record Success，0 遗漏。
• SDK flat error：3 次 callback 均收到 601200702 并携带 PPE Header，Provider 最终失败，0 次假成功。
• 自动断言：52/52 PASS；全部最终证据文件敏感模式扫描 0 命中。
• Commercial 全仓 UT：前两次分别命中两个无关 Observability 存量并发/运行时波动；第三次同 commit 原位重跑 13580 tests 全绿，Diff Line Coverage 86.78%。

关联

• Meego：7362275687
• Commercial MR：https://code.byted.org/flowdevops/cozeloop-commercial/merge_requests/680
• SDK MR：https://code.byted.org/flowdevops/fornax_sdk/merge_requests/245
• FaaS Provider MR：https://code.byted.org/flowdevops/custom_demo/merge_requests/13

当前保持 Draft/Open，等待人工 Code Review；不合并、不创建生产发布。

[codecov]

Codecov Report

❌ Patch coverage is 92.99363% with 22 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...odules/evaluation/domain/service/evaluator_impl.go	87.58%	11 Missing and 7 partials ⚠️
...tion/infra/repo/evaluator/evaluator_record_impl.go	94.64%	2 Missing and 1 partial ⚠️
...aluation/domain/service/expt_run_item_turn_impl.go	95.00%	0 Missing and 1 partial ⚠️

@@            Coverage Diff             @@
##             main     #607      +/-   ##
==========================================
+ Coverage   78.16%   78.23%   +0.07%     
==========================================
  Files         693      693              
  Lines       84808    85009     +201     
==========================================
+ Hits        66288    66507     +219     
+ Misses      14577    14551      -26     
- Partials     3943     3951       +8     

Flag	Coverage Δ
unittests	78.23% <92.99%> (+0.07%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...ation/application/convertor/evaluator/evaluator.go	92.17% <100.00%> (+0.10%)	⬆️
...luation/application/convertor/evaluator/openapi.go	96.55% <100.00%> (+0.02%)	⬆️
...modules/evaluation/application/eval_openapi_app.go	81.73% <100.00%> (+0.14%)	⬆️
...nd/modules/evaluation/application/evaluator_app.go	90.39% <100.00%> (-0.05%)	⬇️
...kend/modules/evaluation/domain/entity/evaluator.go	100.00% <100.00%> (ø)
...tion/domain/entity/evaluator_version_custom_rpc.go	100.00% <100.00%> (ø)
...ckend/modules/evaluation/domain/entity/expt_run.go	98.64% <ø> (ø)
backend/modules/evaluation/domain/entity/param.go	87.71% <ø> (+1.75%)	⬆️
...es/evaluation/domain/service/expt_run_item_impl.go	76.40% <100.00%> (+1.55%)	⬆️
...aluation/domain/service/expt_run_item_turn_impl.go	83.79% <95.00%> (+3.64%)	⬆️
... and 2 more

... and 2 files with indirect coverage changes

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