docs: add M2 distributed implementation plan

research-wiki/index.md

@@ -1,6 +1,6 @@
 # Research Wiki 索引
 
-> 自动生成，更新时间：2026-07-21 02:59 UTC
+> 自动生成，更新时间：2026-07-21 03:46 UTC
 
 ## design (4)
 - [2026-07-20-m1-core-design](designs/2026-07-20-m1-core-design.md) `design:2026-07-20-m1-core-design`
@@ -12,9 +12,11 @@
 - [2026-07-20-m2-soak-workload](findings/2026-07-20-m2-soak-workload.md) `finding:2026-07-20-m2-soak-workload`
 - [M2 真实数据压测: 场景矩阵与数据清单](findings/m2-soak-workload.md) `finding:m2-soak-workload`
 
-## plan (2)
+## plan (4)
 - [2026-07-20-m1-core-plan](plans/2026-07-20-m1-core-plan.md) `plan:2026-07-20-m1-core-plan`
+- [2026-07-20-m2-distributed-plan](plans/2026-07-20-m2-distributed-plan.md) `plan:2026-07-20-m2-distributed-plan`
 - [M1 核心里程碑实现计划](plans/m1-core-plan.md) `plan:m1-core-plan`
+- [M2 分布式实现计划](plans/m2-distributed.md) `plan:m2-distributed`
 
 ## schema (1)
 - [表结构: llm_calls(遥测 18 字段)](schemas/llm-calls.md) `schema:llm-calls`