🪪 feat: Microsoft Graph Access Token Placeholder for MCP Servers (#10867)

* feat: MCP Graph Token env var

* Addressing copilot remarks

* Addressed Copilot review remarks

* Fixed graphtokenservice mock in MCP test suite

* fix: remove unnecessary type check and cast in resolveGraphTokensInRecord

* ci: add Graph Token integration tests in MCPManager

* refactor: update user type definitions to use Partial<IUser> in multiple functions

* test: enhance MCP tests for graph token processing and user placeholder resolution

- Added comprehensive tests to validate the interaction between preProcessGraphTokens and processMCPEnv.
- Ensured correct resolution of graph tokens and user placeholders in various configurations.
- Mocked OIDC utilities to facilitate testing of token extraction and validation.
- Verified that original options remain unchanged after processing.

* chore: import order

* chore: imports

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Co-authored-by: Danny Avila <danny@librechat.ai>

packages/api/src/utils/index.ts

@@ -7,11 +7,13 @@ export * from './env';
 export * from './events';
 export * from './files';
 export * from './generators';
+export * from './graph';
 export * from './path';
 export * from './key';
 export * from './latex';
 export * from './llm';
 export * from './math';
+export * from './oidc';
 export * from './openid';
 export * from './promise';
 export * from './sanitizeTitle';