`module.function()` where `module` is imported produced no calls edge,
while bare-name calls did. The member call was captured, but the shared
cross-file pass skips all member calls and _resolve_python_member_calls
only handled capitalized class receivers, so a lowercase module receiver
fell through. Add a module arm: a lowercase receiver naming a module
imported into the caller's file resolves to the single callable that
module contains. Keyed on stable node ids (imports edge source is the
caller file node; contains maps file -> children), not source_file
strings, so it holds under the cache_root id-remap relativization. Also
drop the no-classes early return that skipped the whole resolver when a
corpus had functions but no class methods.
Guards: only modules imported into the caller's own file match (so
self/obj/local instances never match), and a single-definition god-node
guard on the callable. Adds a positive test and a false-edge negative.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
