Change stdlib artifacts to point to the entry-point into the stdlib

[jtran]

Fixes #8616.

When we do CSG inside the stdlib, the pathToNode of the artifacts point to the stdlib source. This branch changes it so that it points to the user's code that calls the stdlib.

Notice that near the bottom of rust/kcl-lib/tests/holes_cube/artifact_graph_flowchart.snap.md, the subtract changes from pointing to module 15 to module 0, and it now has a NodePath.

This should also change the pathToNode of Operations, but since we filter out operations that are internal to the stdlib, they don't appear in any output.

[vercel]

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Project	Deployment	Preview	Comments	Updated (UTC)
modeling-app	Ready	Preview	Comment	Nov 18, 2025 4:30pm

[codspeed-hq]

CodSpeed Performance Report

Merging #8914 will not alter performance

_{Comparing jtran/ops-stdlib-entry-point (33af41c) with main (076725d)¹}

Summary

✅ 142 untouched
⏩ 92 skipped²

Footnotes

1. No successful run was found on main (f937cb4) during the generation of this report, so 076725d was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

2. 92 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩