Replace pipe character in dbType union notation with 'or' to resolve Mermaid parse error. Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Add documentation for extractor start button and settings save button flows with detailed Mermaid diagrams. Also add logs directory to gitignore. Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>