- push.mjs: pushResult returns delivery status (Promise<boolean>) so the
  server can tell whether the db result extension is actually live
- db_server.mjs: large results (>50 rows or >20 cols) are written to
  .results/<alias>-N.json (accumulated per session) and returned as a
  summary (rowCount/columns/preview + file path); small results or a
  dead extension return full rows as a safe fallback
- .gitignore: ignore .results/
- README.md: project overview, tool reference, extension integration

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>