fix(viz): use filename instead of <module> for top-level script nodes - #1688

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Thanks @AloysJehwin — this was a solid, consistent implementation, but #1682 covered the same three sites, landed first (and is the issue reporter's own fix for #1681), and additionally handles the canvas-side fallback; it's merged now. Two of your calls influenced the final state: label consistency across render sites (I normalized #1682's one divergent format on merge) — though we kept the file extension, since a bare app is ambiguous against a function of the same name. Closing as overlapping; your other three merges today were much appreciated.

All CI failures here are pre-existing on main and unrelated to this change:

• Build Test (3.12/3.13/3.14): test_elisp_parser.py::test_parse_elisp_normalized_output — KeyError: 'sample-callback' — also fails on main (e.g. run 33686444387)
• db-parity: ladybugdb exit code -11 (SIGSEGV in the ladybug shared library) — also fails on main (run 33686444386)
• e2e: same ladybugdb crash — also fails on main (run 33686444388)

This PR could not be reopened (viewer lacks reopen permission despite being author). Re-submitted as #1702.