Add Weighted Exploration Adjustment

• Added a new function for Weighted Exploration Adjustment to dynamically expand top-k results based on similarity score distribution.
• This helps avoid getting stuck in poor local results during refinement, improving overall retrieval quality.
• No change to user-facing result count; just behind-the-scenes optimization.

Stable release of FrameFinderLE

Stable release of FrameFinderLE with core features:
CLIP integration,
hashtag-based refinement,
dual feedback systems,
multi-modal search,
and graph retrieval.