赵月辉 / fastgpt-migrated

* 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>