extract_bash only created a cross-file edge for `source x.sh` / `. x.sh`. The
two most common ways one script runs another — `bash x.sh` and `./x.sh` —
produced no edge, so in any repo where scripts invoke each other by execution
the call topology was missing (each script left an isolated file+entry pair).
Emit a `calls` edge (context `script_invocation`) from the caller's entry (or
enclosing function) to the invoked script's entry node, for script-runner
commands (bash/sh/zsh/ksh/dash <path>) and bare `./x.sh`, but only when the
target resolves to a real .sh file on disk — so no phantom edges to missing or
function-shadowed names. Verified end-to-end: the edges land on real target
nodes (no dangling drop at build).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
