v1.0.4 — backports + empty-state fix

Backports two upstream PRs and fixes a UX bug in context-scout.

What's new since 1.0.3

Bug fix

• fix(context-scout): empty-state handling (upstream issue
  #310).
  When the Context Discovery Protocol returns source: none,
  context-scout no longer falls back to a generic
  Glob: .opencode/**/* and reports "no .opencode directory exists".
  It now surfaces the protocol's empty-state options
  (/install-context, .oac.json, or proceed without) and refuses to
  silently continue with the user's downstream task.

Cherry-picks from upstream

• refactor: agent permissions allow question tool (upstream PR
  #302) —
  openagent.md and opencoder.md now declare permission.question: allow.
• fix: skip node_modules in updater scans (upstream PR
  #309) —
  update.sh no longer recurses into node_modules/ when scanning
  *.md and *.sh files.

Marketplace update

/plugin marketplace update oac-marketplace
/plugin install oac