ranges: restore safe join selection and residual interval filtering

[mwiewior]

Summary

• restore DataFusion join_selection for bio sessions without letting it swap side-sensitive interval joins
• split the interval rewrite into a pre-join-selection pass for CoitreesNearest and CoitreesCountOverlaps, and a post-join-selection pass for symmetric inner overlap joins
• extract residual conjuncts from interval join filters and apply them after interval candidate generation inside IntervalJoinExec
• normalize interval bounds to Int32 once, use the computed build-side bucket estimate, and reuse the interval join scratch buffers and output helpers
• add coverage for residual-filter rewrites and for non-symmetric methods so join selection cannot silently change their semantics

Testing

• cargo test -p datafusion-bio-function-ranges

Partially addresses #33.