A picture deduplicated within a burst must still reach the model once in
its own question and, when cited, again via the capsule re-fetch after
compaction; uncited it is dropped. Two wire tests pin both paths. The
harness builds the rag capability with defer_loading=False: a deferred
evidence capability the model has not loaded presents an empty record,
so compaction computes boundary 0 and rewrites nothing.
qa.md describes max_searches in units.
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