Add comprehensive MARKET_DATA_DESIGN.md to planning directory#113

stephantaljaard24-boop wants to merge 1 commit into

ed-donner:mained-donner/finally:mainfrom

stephantaljaard24-boop:claude/market-data-backend-design-glemfbstephantaljaard24-boop/finally:claude/market-data-backend-design-glemfbCopy head branch name to clipboard