docs(plans): add Spec-3 question-gen-v2 implementation plan

9 tasks: type extension → postprocess → families → sampler_v2 →
generator_v2 → gates → run_store → pipeline_v2 → CLI integration.
Includes structured-logging schemas/metrics and Codex review revisions.

research-wiki/index.md

@@ -1,6 +1,6 @@
 # Research Wiki 索引
 
-> 自动生成，更新时间：2026-07-11 15:07 UTC
+> 自动生成，更新时间：2026-07-12 02:57 UTC
 
 ## design (21)
 - [2026-07-06-core-agent-adapters-llm-design](designs/2026-07-06-core-agent-adapters-llm-design.md) `design:2026-07-06-core-agent-adapters-llm-design`
@@ -25,12 +25,13 @@
 - [赛题生成工具设计](designs/question-gen-synth.md) `design:question-gen-synth`
 - [赛题生成工具设计（Question Generation Synthesis）](designs/2026-07-09-question-gen-synth-design.md) `design:2026-07-09-question-gen-synth-design`
 
-## finding (3)
+## finding (4)
 - [2026-07-11-benchmark-failure-taxonomy](findings/2026-07-11-benchmark-failure-taxonomy.md) `finding:2026-07-11-benchmark-failure-taxonomy`
 - [2026-07-11-question-gen-calibration-analysis](findings/2026-07-11-question-gen-calibration-analysis.md) `finding:2026-07-11-question-gen-calibration-analysis`
 - [Harness 评估: Spec-1 修复验证 (infer_spec1check)](findings/eval-spec1check.md) `finding:eval-spec1check`
+- [Harness 评估: Spec-2 批量并行建树](findings/eval-spec2-batch-tree-build.md) `finding:eval-spec2-batch-tree-build`
 
-## plan (21)
+## plan (22)
 - [2026-07-06-core-agent-adapters-llm](plans/2026-07-06-core-agent-adapters-llm.md) `plan:2026-07-06-core-agent-adapters-llm`
 - [2026-07-07-app-harness](plans/2026-07-07-app-harness.md) `plan:2026-07-07-app-harness`
 - [2026-07-07-core-evolution](plans/2026-07-07-core-evolution.md) `plan:2026-07-07-core-evolution`
@@ -48,7 +49,18 @@
 - [question_gen 模块实现计划](plans/question-gen.md) `plan:question-gen`
 - [Spec-1 Agent 执行环境修复实现计划](plans/agent-runtime-fixes-plan.md) `plan:agent-runtime-fixes-plan`
 - [Spec-2 建树批量并行实现计划](plans/batch-tree-build-plan.md) `plan:batch-tree-build-plan`
+- [出题管线 v2 实现计划](plans/2026-07-11-question-gen-v2.md) `plan:2026-07-11-question-gen-v2`
 - [建树修复管线三项改造实现计划](plans/tree-repair-resilience.md) `plan:tree-repair-resilience`
 - [建树模块竖切实现计划](plans/tree-module-vertical-slice.md) `plan:tree-module-vertical-slice`
 - [赛题生成工具实现计划](plans/question-gen-synth.md) `plan:question-gen-synth`
 - [项目基础设施初始化计划](plans/infrastructure-setup.md) `plan:infrastructure-setup`
+
+## schema (2)
+- [表结构: question_gen_items（逐题门判定）](schemas/question-gen-items.md) `schema:question-gen-items`
+- [表结构: question_gen_runs（出题批次）](schemas/question-gen-runs.md) `schema:question-gen-runs`
+
+## metric (4)
+- [出题四门总拦截率](metrics/qgen-gate-rejection-rate.md) `metric:qgen-gate-rejection-rate`
+- [最终接受率](metrics/qgen-acceptance-rate.md) `metric:qgen-acceptance-rate`
+- [答案位置分布均匀性](metrics/qgen-answer-uniformity.md) `metric:qgen-answer-uniformity`
+- [重出收敛率（3轮内过门）](metrics/qgen-regen-convergence.md) `metric:qgen-regen-convergence`