chore: register M1 plan entity in research wiki

research-wiki/index.md

@@ -1,7 +1,11 @@
 # Research Wiki 索引
 
-> 自动生成，更新时间：2026-07-20 09:55 UTC
+> 自动生成，更新时间：2026-07-20 10:18 UTC
 
 ## design (2)
 - [2026-07-20-m1-core-design](designs/2026-07-20-m1-core-design.md) `design:2026-07-20-m1-core-design`
 - [M1 核心里程碑设计:公共签名冻结与治理栈落地](designs/m1-core-design.md) `design:m1-core-design`
+
+## plan (2)
+- [2026-07-20-m1-core-plan](plans/2026-07-20-m1-core-plan.md) `plan:2026-07-20-m1-core-plan`
+- [M1 核心里程碑实现计划](plans/m1-core-plan.md) `plan:m1-core-plan`