Martin Hohenberg dc8918d323 Isolate STL analysis in child process; fix 3MF memory usage ...

- _load_geometry(): compute extents/volume from individual Scene meshes
  without concatenating — avoids the RAM spike that crashed the container
- analyse_in_background(): spawns a child process (spawn context, not fork)
  with a 120s timeout; OOM/crash in child no longer takes down the app
- _failed set: tracks files that timed out or crashed; spinner stops and
  a warning with inline override form is shown instead of looping forever
- analysis_failed state passed to template; override form shown immediately
  when analysis failed (no expand needed)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-06-19 11:32:15 +02:00

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