Graphiti MCP Server

## Summary Brief description of the changes in this PR. ## Type of Change - [ ] Bug fix - [ ] New feature - [ ] Performance improvement - [ ] Documentation/Tests ## Objective **For new features and performance improvements:** Clearly describe the objective and rationale for this change. ## Testing - [ ] Unit tests added/updated - [ ] Integration tests added/updated - [ ] All existing tests pass ## Breaking Changes - [ ] This PR contains breaking changes If this is a breaking change, describe: - What functionality is affected - Migration path for existing users ## Checklist - [ ] Code follows project style guidelines (`make lint` passes) - [ ] Self-review completed - [ ] Documentation updated where necessary - [ ] No secrets or sensitive information committed ## Related Issues Closes #[issue number]