triggers

Index refresh behaviour ( capability detail in features-graph-analysers.rq ):
- indexing_incrementality / nonblocking_index — incremental where possible
- indexing_trigger_filesave / idea_index_triggers — on `.rq` file change
- indexing_trigger_manual — manual reindex commands
- indexing_trigger_open — one soft sync after the activity-bar first-paint gate
- indexing_trigger_auto — idle background mtime staleness check ( cheap; not a full reindex )
Editor watches + idle scheduler: index-service.ts; headless syncs on runtime activate.

Interactive page: triggers