Cheapest way to discover the wiki's own vocabulary — the best recovery move
when a search misses. Prefer this over search_manual when you need the
shape of a topic rather than a specific answer.

Args:
    query: Optional keywords to filter section headings and page titles.
    family: Optional operator family filter — TOP, CHOP, SOP, DAT, MAT, COMP, POP.
    limit: Maximum sections to list.

Runs BM25 and dense retrieval, fuses with Reciprocal Rank Fusion, rescores
with a cross-encoder. If the top score signals a probable miss, a second
HyDE pass fires automatically. Handles exact operator/parameter names and
paraphrased questions alike.

Args:
    query: What you need to know.
    family: Optional operator family scope — TOP, CHOP, SOP, DAT, MAT, COMP, POP.
        Use it when the question is about one family's operator; same-named
        operators exist across families.
    limit: Maximum passages to return.

Use after search_manual or browse_manual to get surrounding context.
Titles are exact wiki titles, e.g. "Noise TOP", "CHOP Execute DAT",
"noiseTOP Class".

Args:
    title: Exact wiki page title.
    section: Optional section heading to return just that section.