feat: pick sketch profiles by their bounding curve ids so features keep the same region when parameters move the geometry, matching curves cut into pieces, refusing ambiguous or missing picks instead of taking another region, and storing point picks by curves

crates/sketch/src/lib.rs

@@ -27,7 +27,7 @@ pub use dims::{DimFrame, DimLayout, chain_centres, default_text, dim_frame, dim_
 pub use link::{Link, LinkGeom, LinkKind, LinkSource, MAX_LINK_ENTITIES};
 pub use model::{Constraint, ConstraintKind, Curve, CurveKind, SPoint, Sketch, SketchError, SketchView};
 pub use offset::OffsetChain;
-pub use profiles::{Profile, find_drawn_profiles, find_profiles, merge_regions};
+pub use profiles::{CurvePick, Profile, distinct_curves, find_drawn_profiles, find_profiles, merge_regions, profile_at_point, profile_by_curves};
 pub use shape::{Shape, intersections};
 pub use solver::{Hold, SolveReport, SolveStatus, measure_dimension, solve, solve_holding};
 pub use text::{MAX_TEXT_CHARS, text_geometry};