- Updated `settings-test.md` to include new test cases for sequential workspace address preparation and indexing.
- Modified `workbench-test.md` to clarify restrictions on direct calls to workspace preparation methods in E2E tests.
- Revised `test.md` to establish stricter rules for backend case testing, prohibiting the use of mocks and requiring production implementations.
- Refactored IPC handlers to improve job handling and indexing speed application.
- Enhanced `EmbeddingService` to apply indexing speed settings directly.
- Added new tests for sequential workspace preparation and indexing to ensure proper job execution order.
- Introduced utility functions for adding and removing workspace directories through the settings UI in E2E tests.