v4.23.0 — show the spawning Claude Code session on worker rows

Added

• Worker rows now identify the Claude Code session that spawned them. Every backend parser
  records Claude Code's inherited session id in meta.json, preserving the original non-empty
  value across resumes. The dashboard shows the parent project and short session id before the
  worker cwd, while legacy workers without the field retain their previous metadata line.

• Parent-project resolution stays cheap on the SSE-refreshed worker list. The list route maps
  session ids to dash-encoded ~/.claude/projects directories using cached directory listings
  only; it never reads transcript contents. The existing transcript-based parent index remains
  confined to the worker detail route.