Added

• stored parameter on TextField, StringField, and NumericField constructors (defaults to true, preserving existing behaviour). Reported by @umlx5h in #7.
• StoredField class for stored-only values without indexing. Added following feedback from @umlx5h in #7.

Fixed

• PrefixQuery and WildcardQuery used as sub-clauses inside a BooleanQuery now return results correctly. The ExecuteSubQuery dispatch switch was missing cases for both query types, causing all intersections to silently return empty results. Reported by @umlx5h in #6.
• SearcherManager background-refresh test was susceptible to a race condition when using the default 1-second refresh interval; test now uses a 5-minute interval to keep the background loop dormant during assertions.