PluginStore's constructor treats its rootDir arg as a project root and
internally appends `.fusion` before opening the SQLite DB. Several CLI
call sites were passing the already-resolved `.fusion` directory,
producing a doubled `.fusion/.fusion/fusion.db` that the dashboard
process kept recreating on every project load.
Pass the project root instead so the DB lands in the canonical
`.fusion/fusion.db` alongside the rest of the project's state.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
