docs: add M3 OCR port family design

research-wiki/index.md

@@ -1,14 +1,16 @@
 # Research Wiki 索引
 
-> 自动生成，更新时间：2026-07-21 21:34 UTC
+> 自动生成，更新时间：2026-07-22 01:37 UTC
 
-## design (6)
+## design (8)
 - [2026-07-20-m1-core-design](designs/2026-07-20-m1-core-design.md) `design:2026-07-20-m1-core-design`
 - [2026-07-20-m2-distributed-design](designs/2026-07-20-m2-distributed-design.md) `design:2026-07-20-m2-distributed-design`
 - [2026-07-21-m25-resilience-design](designs/2026-07-21-m25-resilience-design.md) `design:2026-07-21-m25-resilience-design`
+- [2026-07-21-m3-ocr-design](designs/2026-07-21-m3-ocr-design.md) `design:2026-07-21-m3-ocr-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`
 - [M2 分布式:Redis 治理后端+背压+Postgres 遥测+pricing+Embedding+压测 harness](designs/m2-distributed.md) `design:m2-distributed`
 - [M2.5 治理韧性: 半死源隔离与健康感知调度](designs/m25-resilience.md) `design:m25-resilience`
+- [M3 OCR 端口族设计](designs/m3-ocr.md) `design:m3-ocr`
 
 ## finding (7)
 - [2026-07-20-m2-soak-workload](findings/2026-07-20-m2-soak-workload.md) `finding:2026-07-20-m2-soak-workload`