Files-DB-MCP

# TASK-012: Fix Test Suite Issues ## Description The test suite has several failures that need to be addressed: 1. File permission errors in file_processor tests 2. Asyncio-related issues in SSE interface tests 3. Linting errors across multiple files ## Acceptance Criteria - [ ] Fix file_processor tests to handle file permissions properly - [ ] Set up proper asyncio environment for SSE tests - [ ] Resolve all linting errors identified by ruff - [ ] All tests pass on CI ## Technical Notes - File permission issues are likely due to trying to create mock directories with insufficient permissions - SSE tests need proper async fixture setup with pytest-asyncio - Linting should be fixed with `ruff --fix` and manual fixes for the remaining issues ## Dependencies - TASK-005: SSE Support - TASK-010: Configurable Embedding Models ## Estimated Effort Small (1-2 hours) ## Priority High - Blocking proper CI/CD pipeline functionality