fix: relax MCP tool JSON Schema Zod validation to handle non-standard types (#6455)

* fix: relax MCP tool JSON Schema Zod validation to accept any type values

MCP servers may return JSON Schema with type values outside the
standard 6 types. Use z.any() for type and items fields to avoid
500 errors on /api/core/app/mcpTools/getTools.

- Remove SchemaInputValueTypeSchema enum and SchemaInputValueType
- Remove unnecessary .passthrough()
- Use plain string type for function parameters

Fixes #6451

* fix: mcp adapt

---------

Co-authored-by: c121914yu <yucongcong_test@163.com>

document/data/doc-last-modified.json

@@ -205,4 +205,4 @@
   "document/content/docs/use-cases/external-integration/openapi.mdx": "2026-02-12T18:45:30+08:00",
   "document/content/docs/use-cases/external-integration/wecom.mdx": "2025-12-10T20:07:05+08:00",
   "document/content/docs/use-cases/index.mdx": "2025-07-24T14:23:04+08:00"
-}
+}