Summary

This updates the Research Lab pipeline to add a new survey stage and remove
the old Research/ workspace concept from new projects.

What changed

• Add survey to the canonical pipeline stage order:
• Add survey sections, task blueprints, and generation rules to
  research_brief.json
• Add survey stage skill mappings
• Create Survey/ directories for new projects and write Survey.* paths into
• Treat legacy Research/ content as survey-stage content for compatibility
• Update templates and docs to reflect the new stage model

Compatibility

• Existing projects that still contain Research/ are handled as legacy survey
  content in the UI
• New projects use Survey/ instead of Research/

Verification

• Parsed modified JSON files successfully
• Ran node --check on:
  • server/routes/taskmaster.js
  • server/projects.js

Notes

• This PR intentionally does not include unrelated worktree deletions in
  AGENTS.md and skills/TEST_GUIDE.md