Function build_record 

pub fn build_record(
    unit: &FnUnit<'_>,
    path: &str,
    imports: &Imports,
    module_bindings: &HashSet<String>,
    span: &SpanIndex<'_>,
    module_map: &PyModuleMap,
) -> UnitRecord

Build a language-neutral fxrank_core::record::UnitRecord for unit.

Calls the shared [gather] helper (same as analyze_unit) so the record’s effects/risks/async_boundary/await_count are byte-identical to the Hotspot. Also extracts outgoing call references via refs::extract for the cross-file resolver.

INVARIANT: this recomputes own-body via the same gather as analyze_unit. This stays correct only while analyze_unit does NO post-gather mutation of effects/risks (unlike TS, which absorbs React signals and so must copy from the final Hotspot). If you add a post-gather step here, switch to copying from the Hotspot or the record’s own-body will drift from it.