feat(parity): static-geometry h3indexset prefilter (geoToH3IndexSet + everEq)#198
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H3INDEXSET is a Set<H3INDEX> blob covering a static geometry at a given H3 resolution. Two new UDFs accelerate trip × static cross-join queries (BerlinMOD Q4, Q7, Q11, Q12, Q15, Q17): - geoToH3IndexSet(GEOMETRY, INTEGER) → H3INDEXSET: covers POINT, LINESTRING, POLYGON, MULTI*, and GeomCollection input in EPSG:4326. - everEq(H3INDEXSET, TH3INDEX) → BOOLEAN: true when the trajectory ever passes through any cell of the static set; overloads the existing everEq family. Q7-style intersection on BerlinMOD sf 0.005: 0.517 s without prefilter, 0.076 s with prefilter (6.8×).
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Expose the static-geometry h3indexset prefilter that narrows a th3index candidate set before the exact spatial test. geoToH3IndexSet(GEOMETRY, INTEGER) returns the Set of H3 cells covering the geometry in EPSG:4326; everEq(H3INDEXSET, TH3INDEX) tests whether a th3index trajectory ever equals any cell in that set, backed by ever_eq_anyof_h3indexset_th3index from the canonical MEOS surface. Both functions derive their DuckDB camelCase names from the MEOS snake_case symbols by the per-binding mechanical rule.