Dense embedders mean-pool over a whole chunk, so a 'Figure 1:' caption
buried at the end of a 500-token body chunk gets washed out by the
surrounding theory text and never surfaces for queries about that
figure. Pre-split each page's markdown at the start of every
Figure/Table caption line so the caption anchors its own chunk, which
gives both BM25 and the dense vector a focused, figure-dominated
target. Handles numbered, decimal, and appendix-style labels
(Figure 1, Figure 1.2, Figure B.1, Table 4, Fig./Tab. abbreviations).
ba0fd85e8b