fix(tools): use @deepseek-ai/cordis and @deepseek-ai/schemastery imports

packages/core/tools/src/index.ts

@@ -4,8 +4,8 @@
  * @module @deepseek-ai/dsh-tools
  */
 
-import { Context, Service } from 'cordis'
-import z from 'schemastery'
+import { Context, Service } from '@deepseek-ai/cordis'
+import z from '@deepseek-ai/schemastery'
 import { AnonymousEntries, NamedEntries, ScopedLayers, scopeOf, scopeTarget } from '@deepseek-ai/dsh-scope'
 import type { ScopeKey, ScopeLayer, Scoped } from '@deepseek-ai/dsh-scope'
 import type { CallId, ContentBlock, ToolSchema } from '@deepseek-ai/dsh-llm'