[Backport release/0.0.14] build: fetch LFS test data before the suites run

[github-actions]

Description

Backport of #4106 to release/0.0.14.

[greptile-apps]

Confidence Score: 4/5

Not safe to merge: affected tests can still perform the timeout-prone LFS download during test execution.

Findings

1.  Dynamic archives omitted ▶

Summary

The new prefetch helper moves many LFS test-data downloads ahead of the pytest launchers, but it misses archives whose filenames are assembled with f-strings. The affected occupancy tests can still download their data while running, so this is not safe to merge until those archives are included.

_{Reviews (1) · Last reviewed commit: "build: fetch LFS test data before the su..."}

[greptile-apps]

Dynamic archives omitted

The selector only includes an archive when its complete filename appears as a quoted Python literal. The occupancy tests construct filenames from palette or method, so their existing archives—including visualize_occupancy_rainbow.png, resample_path_simple.png, and gradient_voronoi.png—are not prefetched. When those files are absent locally, get_data() still downloads them during the test, leaving the download-delay timeout this change is intended to avoid.

Note: If this suggestion doesn't match your team's coding style, reply to this and let me know. I'll remember it for next time!

Artifacts

Dynamic asset selection validation script

• The executable script reproduces the changed archive-selection predicate against dynamically generated test-data names.

Dynamic asset selection validation output

• The captured output shows that all six existing dynamic asset archives are excluded by the selector.

_{Ran code and verified through T-Rex}