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/api/remotes/src/agent-lookup.ts

@@ -1,6 +1,6 @@
 /** Host BFF policy for resolving Remote Agent and Session identities. */
 
-import type { Context } from 'cordis'
+import type { Context } from '@deepseek-ai/cordis'
 import type { Agent, AgentOptions, AgentSetup } from '@deepseek-ai/dsh-agent'
 import type { Session, SessionEvent, SessionHeader, SessionId } from '@deepseek-ai/dsh-session'
 import type {} from '@deepseek-ai/dsh-session-persistence'

packages/api/remotes/src/client/index.ts

@@ -1,13 +1,13 @@
 /** Platform-neutral assembly of generated Host Remote contributions. */
 
-import type { Context } from 'cordis'
+import type { Context } from '@deepseek-ai/cordis'
 import goalsRemote from '@deepseek-ai/dsh-goal/remote'
 import type { TypeRTClientRemote } from '@deepseek-ai/dsh-type-meta'
 
 export type { TypeRTClientRemote as ClientRemote } from '@deepseek-ai/dsh-type-meta'
 export type {} from '@deepseek-ai/dsh-goal/remote'
 
-declare module 'cordis' {
+declare module '@deepseek-ai/cordis' {
   interface Context {
     /** Generated Remote namespaces selected by this Client assembly. */
     remote: TypeRTClientRemote

packages/api/remotes/src/invariant.ts

@@ -1,7 +1,7 @@
 /** Package-owned invariant companion for `@deepseek-ai/dsh-api-remotes`. */
 
 /* jscpd:ignore-start */
-import type { Context } from 'cordis'
+import type { Context } from '@deepseek-ai/cordis'
 import type { InvariantInstaller } from '@deepseek-ai/dsh-invariants'
 
 const PACKAGE_NAME = '@deepseek-ai/dsh-api-remotes'