perf(storage): SQL history index + prune without nested OFFSET (#428) - #442
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Index (connection_id, database_name, recorded_at, id); prune via count + oldest-id DELETE instead of nested OFFSET subquery. Schema v8 migration. Closes #428
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Summary
(connection_id, database_name, recorded_at DESC, id DESC)matching list/prune predicates.COUNT→ select oldest overflow ids →DELETE … WHERE id IN (…).Closes #428
Test plan
flutter test test/core/storage/sql_query_history_test.dart