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## Summary by CodeRabbit
* **New Features**
* Introduced a new endpoint for MCP (Model Context Protocol) server
interaction under `/api/workspaces/:workspaceId/mcp`, enabling advanced
document reading and search capabilities within workspaces.
* Added support for semantic and keyword search tools, as well as
document reading through the MCP server, with user access control and
input validation.
* **Improvements**
* Enhanced metadata handling in semantic search results for improved
clarity.
* Streamlined internal imports and refactored utility functions for
better maintainability.
* **Chores**
* Added a new SDK dependency to the backend server package.
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