RAGFlow Claude MCP Server

## Description <!-- Brief description of what this PR does --> ## Type of Change - [ ] 🐛 Bug fix (non-breaking change which fixes an issue) - [ ] ✨ New feature (non-breaking change which adds functionality) - [ ] 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected) - [ ] 📝 Documentation update - [ ] 🔧 Configuration change - [ ] ♻️ Code refactoring ## Related Issue <!-- Link to related issue if applicable --> Fixes #(issue number) ## Testing - [ ] I have tested this locally with Claude Desktop - [ ] I have verified the MCP server starts correctly - [ ] I have tested the affected tools/functionality - [ ] I have added tests (if applicable) ## Checklist - [ ] My code follows the project's code style - [ ] I have performed a self-review of my code - [ ] I have commented my code, particularly in hard-to-understand areas - [ ] I have made corresponding changes to the documentation - [ ] I have checked my code and ensured no secrets/API keys are exposed - [ ] My changes generate no new warnings or errors - [ ] Any dependent changes have been merged and published ## Screenshots (if applicable) <!-- Add screenshots to help explain your changes --> ## Additional Notes <!-- Add any additional notes or context about the PR here -->