feat(mcp): describe complete CAD record schemas

crates/ocs_plugin_api/ARCHITECTURE.md

@@ -219,7 +219,7 @@ Broadcasting is V4-gated inside `PluginManager::broadcast_notification`: V2/V3 p
 
 The crate embeds two JSON blobs at build time:
 
-- **Type registry** (`OUT_DIR/type_registry.json`) — a language-binding-friendly schema for a curated allow-list of `acadrust` types, generated by `serde-reflection` in `build.rs`. See [`src/type_registry.rs`](src/type_registry.rs).
+- **Type registry** (`OUT_DIR/type_registry.json`) — a language-binding-friendly schema for every editor record root and its dependent types, generated by `serde-reflection` in `build.rs`. See [`src/type_registry.rs`](src/type_registry.rs).
 - **Version info** (`OUT_DIR/version_info.json`) — host version, `ocs_plugin_api` version, `acadrust` version and source, `rustc` version, API versions, build timestamp. See [`src/version_info.rs`](src/version_info.rs).
 
 Both are accessible without enabling the `host` feature.