docs: regenerate catalogs and graphs for the projection-cache seam; classify its types

gen-cordis-catalog/api, config and persistence catalogs, and doc graphs
regenerated over the new sessionProjectionCache service and the registry's
checkpoint faces. Classifications: ProjectionCheckpoint joins the type-link
exemptions (owned by the projection package source), Partial joins the
foundation names, the cache service gets its capability-seam role row, and
the package takes the one-sentence Model Experience contract (host-side
read-model accelerator, no model surface).

packages/session-projection/session-projection-cache/README.zh.md

@@ -43,17 +43,11 @@
 
 ## 模型体验
 
-### 模型看到什么
+无，因为缓存只持久化并恢复 host 侧的、由已入日志会话状态派生的读模型，不触碰任何提示词、消息、schema、流或工具结果。
 
-什么都看不到。缓存是 host 侧读模型加速器；没有提示词、schema 或工具表面。
+#### KV 缓存影响
 
-### Token 影响
-
-零。
-
-### KV 缓存影响
-
-无——不改变任何请求内容。
+无；缓存从不组装或发送提供方请求。
 
 ## 已知局限与延后工作