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/workflow/workflow-workerthread/tests/built-worker.e2e.ts

@@ -21,7 +21,7 @@ describe.skipIf(!existsSync(builtIndex) || !existsSync(builtWorker))('built work
     const driver = join(packageRoot, `.built-worker-driver-${process.pid}.mjs`)
     try {
       await writeFile(driver, `
-import { Context } from 'cordis'
+import { Context } from '@deepseek-ai/cordis'
 import SubagentService from '@deepseek-ai/dsh-subagent'
 import WorkerWorkflowEngine from '@deepseek-ai/dsh-workflow-workerthread'
 

packages/workflow/workflow-workerthread/tests/integration.spec.ts

@@ -1,5 +1,5 @@
 import { describe, expect, it } from 'vitest'
-import { Context } from 'cordis'
+import { Context } from '@deepseek-ai/cordis'
 import { SessionId } from '@deepseek-ai/dsh-session'
 import AgentLoop from '@deepseek-ai/dsh-agent-loop'
 import { mountAgentLoopTestDependencies } from '@deepseek-ai/dsh-agent-loop-testkit'

packages/workflow/workflow-workerthread/tests/source-worker.compat.spec.ts

@@ -5,7 +5,7 @@
  */
 
 import { expect, it, vi } from 'vitest'
-import { Context } from 'cordis'
+import { Context } from '@deepseek-ai/cordis'
 import type { Agent } from '@deepseek-ai/dsh-agent'
 import SubagentService from '@deepseek-ai/dsh-subagent'
 import type { SubagentProvider } from '@deepseek-ai/dsh-subagent'

packages/workflow/workflow-workerthread/tests/workflow-workerthread.e2e.ts

@@ -1,5 +1,5 @@
 import { afterEach, describe, expect, it } from 'vitest'
-import { Context } from 'cordis'
+import { Context } from '@deepseek-ai/cordis'
 import LlmService from '@deepseek-ai/dsh-llm'
 import SessionStore, { SessionId } from '@deepseek-ai/dsh-session'
 import SystemPrompt from '@deepseek-ai/dsh-system-prompt'

packages/workflow/workflow-workerthread/tests/workflow-workerthread.spec.ts

@@ -1,8 +1,8 @@
 import { describe, expect, it, vi } from 'vitest'
 import { fileURLToPath } from 'node:url'
 import type { Worker } from 'node:worker_threads'
-import { Context } from 'cordis'
-import Loader from '@cordisjs/plugin-loader'
+import { Context } from '@deepseek-ai/cordis'
+import Loader from '@deepseek-ai/cordis-plugin-loader'
 import type { Agent } from '@deepseek-ai/dsh-agent'
 import SubagentService from '@deepseek-ai/dsh-subagent'
 import type { SubagentCapabilities, SubagentProvider, SubagentResult, SubagentRun, SubagentStartRequest } from '@deepseek-ai/dsh-subagent'