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/core/agent/tests/agent-initiator.spec.ts

@@ -1,5 +1,5 @@
 import { describe, expect, it } from 'vitest'
-import { Context } from 'cordis'
+import { Context } from '@deepseek-ai/cordis'
 import { runInNewContext } from 'node:vm'
 import AgentRegistry from '@deepseek-ai/dsh-agent'
 import type { Agent } from '@deepseek-ai/dsh-agent'

packages/core/agent/tests/agent.spec.ts

@@ -1,5 +1,5 @@
 import { describe, expect, expectTypeOf, it } from 'vitest'
-import { Context, Service, symbols } from 'cordis'
+import { Context, Service, symbols } from '@deepseek-ai/cordis'
 import { createUserMessage, freezeMessage } from '@deepseek-ai/dsh-llm'
 import { Session, SessionId, type UserMessage } from '@deepseek-ai/dsh-session'
 import AgentRegistry, {

packages/core/agent/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 type { Agent } from '@deepseek-ai/dsh-agent'
 import * as AgentInvariant from '@deepseek-ai/dsh-agent/invariant'
 import { scopeTarget } from '@deepseek-ai/dsh-scope'

packages/core/agent/tests/model-selection.spec.ts

@@ -1,5 +1,5 @@
 import { describe, expect, it } from 'vitest'
-import { Context } from 'cordis'
+import { Context } from '@deepseek-ai/cordis'
 import SystemPrompt from '@deepseek-ai/dsh-system-prompt'
 import {
   agentEvents,

packages/core/agent/tests/verify-export-jsdoc.spec.ts

@@ -154,7 +154,7 @@ describe('verify-export-jsdoc type-level exports', () => {
 
   it('skips `declare module` augmentation bodies (the cordis gate owns them)', () => {
     expect(collectExportJsdocViolations(make(
-      "declare module 'cordis' {\n  interface Events {\n    'fix/x'(): void\n  }\n}\nexport {}\n",
+      "declare module '@deepseek-ai/cordis' {\n  interface Events {\n    'fix/x'(): void\n  }\n}\nexport {}\n",
     ))).toEqual([])
   })
 })