build(vendor): rescope the vendored Cordis packages into @deepseek-ai

Machine-produced by `pnpm run rescope-vendor --apply` plus the regeneration it
prints: `pnpm install` for the lockfile, `pnpm run gen-third-party-notices`,
`verify-translation-pairing --write` for the touched bilingual pairs,
`gen-doc-graphs`, and one typert snapshot whose ids embed character offsets.
`pnpm run rescope-vendor --check` verifies the result.

Renames nine vendored packages (cordis, cosmokit, schemastery and the six
@cordisjs plugins) and every reference that resolves them: manifest names and
dependency keys, module specifiers including declare-module merges, cordis.yml
plugin names, tsconfig paths, every Markdown fence, and `docs/` prose.
Directory names, upstream versions, and dependency ranges are unchanged, so
vendor/README.md still reads as an upstream snapshot; its manifest table gains
an upstream-name column so THIRD_PARTY_NOTICES keeps MIT attribution pointed
at each fork's origin.

The tutorial tier follows the rename end to end: its yaml fences named plugins
the Loader can no longer resolve, its `ts ignore-check` fences disagreed with
the compiled fences beside them, and its prose quoted both. The contracts that
told readers to keep upstream names — the root convention and the vendoring
cookbook's tree comment and manifest invariant — now say to rescope instead.

Two rules read `@deepseek-ai/` as "another workspace plugin": the client bundle
purity gate now names the vendored libraries a browser bundle inlines, and the
files where a bare `cordis` is an agent-preset id keep that product data.

packages/fs/fs/package.json

@@ -29,13 +29,13 @@
     "@deepseek-ai/dsh-invariants": "^0.0.1",
     "@deepseek-ai/dsh-llm": "^0.0.1",
     "@deepseek-ai/dsh-sandbox": "^0.0.1",
-    "cordis": "^4.0.0-rc.7"
+    "@deepseek-ai/cordis": "^4.0.0-rc.7"
   },
   "devDependencies": {
     "@deepseek-ai/dsh-brand": "workspace:^",
     "@deepseek-ai/dsh-invariants": "workspace:^",
     "@deepseek-ai/dsh-llm": "workspace:^",
     "@deepseek-ai/dsh-sandbox": "workspace:^",
-    "cordis": "^4.0.0-rc.7"
+    "@deepseek-ai/cordis": "^4.0.0-rc.7"
   }
 }

packages/fs/fs/src/index.ts

@@ -8,7 +8,7 @@
  * @module @deepseek-ai/dsh-fs
  */
 
-import { Context, Service } from 'cordis'
+import { Context, Service } from '@deepseek-ai/cordis'
 import type { SandboxExecutionPolicy, SandboxMode } from '@deepseek-ai/dsh-sandbox'
 import type {
   FsDirEntry,
@@ -41,7 +41,7 @@ export type {
   FsWriteOutcome,
 } from './types.ts'
 
-declare module 'cordis' {
+declare module '@deepseek-ai/cordis' {
   interface Context {
     fs: FileSystem
   }

packages/fs/fs/src/invariant.ts

@@ -1,6 +1,6 @@
 /** Package-owned filesystem event-data invariants. @module @deepseek-ai/dsh-fs/invariant */
 
-import type { Context } from 'cordis'
+import type { Context } from '@deepseek-ai/cordis'
 import type { InvariantInstaller } from '@deepseek-ai/dsh-invariants'
 import type { FsObservation, FsTarget } from './types.ts'
 

packages/fs/fs/tests/invariant.spec.ts

@@ -1,5 +1,5 @@
 import { describe, expect, it } from 'vitest'
-import { Context } from 'cordis'
+import { Context } from '@deepseek-ai/cordis'
 import { FsTargetKey, FsVersion } from '@deepseek-ai/dsh-fs'
 import type { FsTarget } from '@deepseek-ai/dsh-fs'
 import * as FsInvariant from '@deepseek-ai/dsh-fs/invariant'

packages/fs/fs/tests/service.spec.ts

@@ -6,7 +6,7 @@
  */
 
 import { describe, expect, it } from 'vitest'
-import { Context } from 'cordis'
+import { Context } from '@deepseek-ai/cordis'
 import { FileSystem, FsError, FsTargetKey, FsVersion } from '@deepseek-ai/dsh-fs'
 import type {
   FsDirEntry,