test(formatters): add coverage for formatEventDetails, formatSolution, table helpers

57 new tests covering:
- formatEventDetails with all conditional sections: stack traces,
  breadcrumbs, request, user/geo, environment, replay, tags, SDK
- formatSolution with steps, empty steps, markdown in descriptions
- formatLogTable and formatTraceTable batch rendering
- mdRow, mdKvTable, mdTableHeader, escapeMarkdownCell helpers

Author: BYK