Function fuseChannels

fuseChannels(
    params: {
        ids: readonly string[];
        denseRanking: readonly string[];
        documents: Map<string, string>;
        recency: Map<string, number>;
        queryText: string | undefined;
        relevanceWeight: number;
        recencyWeight: number;
        rrfK?: number;
    },
): string[]
| null
RRF-fuse a dense ranking with lexical (BM25) and recency rankings over the same id set. Returns the fused id ordering, or null when there is no lexical signal (blank query / no shared terms) so the caller falls back to its classic dense+recency blend.
Parameters
- params: {
      ids: readonly string[];
      denseRanking: readonly string[];
      documents: Map<string, string>;
      recency: Map<string, number>;
      queryText: string | undefined;
      relevanceWeight: number;
      recencyWeight: number;
      rrfK?: number;
  }
Returns string[] | null
- Defined in src/retrieval.ts:104