Fixes aft_search so replies that answer from a capped file walk while the trigram index is still loading disclose the bounded walk and don't claim the index was ready.
Fallback replies now open with the bounded-walk disclosure plus any walk-cap warning and report status partial.
The lane footer keeps trigram: building when the load landed after the plan was made, including the cache-unavailable fallback path.
Exact-search wait tests publish the index from a test-only hook instead of racing a sleeping publisher thread against the wait budget.
Confidence Score: 5/5
The PR appears safe to merge; no blocking issues were found.
Summary
Search replies now disclose when results came from a bounded file walk while the trigram index was loading.
Search replies disclose when results came from a bounded file walk.
