Update documentation to reflect new TXT format with separator for summarization tests instead of JSON format. Clarify that expected field may be empty if summary generation fails.
feat: change test generation to TXT format with separator
Change test generation from JSON to TXT format with TEST_SEPARATOR. Add filename sanitization function to handle MongoDB record IDs. Update output path and file naming logic. Add attempt to generate expected summary through LLM with fallback to empty string.
