content: #297/#298 fixes did not reach the pipeline template, ai-mesh-cleanup skill, scale rule, or export-preset-axis example #326

Why it matters

PR #309 fixed the Unreal location-scale bug (#297) and the per-object transform_apply loop with an ineffective selected_objects override (#298) in the snippets only. The same defects remain in four other places, including the shipped pipeline template and the skill/rule an AI reads before writing this code. The Unreal one produces wrong output: centimeter geometry on node translations still in meters.

Evidence

• templates/ai-asset-pipeline-template/pipeline.py:275-282 (Unreal path) scales obj.scale ×100 but never obj.location. origin_to_base() (~line 129) always moves location.z off zero, so every exported LOD is affected.
• templates/ai-asset-pipeline-template/pipeline.py:236-241 apply_selected_mesh_transforms() still loops apply_object_transform(obj) per object.
• skills/ai-mesh-cleanup/SKILL.md:50-55 overrides selected_objects=[obj] (does not narrow transform_apply, per snippets: export presets loop transform_apply per object; selected_objects override does not narrow the operator #298) and calls it in a loop (lines ~110-112).
• rules/validate-imported-mesh-scale.mdc "required pattern" loops transform_apply per object — violating the repo's own prefer-data-over-ops-in-loops rule.
• examples/export-preset-axis/export_preset_axis.py:305-314:

  for obj in list(bpy.context.selected_objects):
      ...
      with bpy.context.temp_override(object=obj, active_object=obj, selected_objects=[obj]):
          bpy.ops.object.transform_apply(location=False, rotation=True, scale=True)

  The fixed snippets/export_preset_unity.py:17-27 documents why this is wrong.

Suggested approach

Port the snippet bodies: scale location with scale for Unreal; one transform_apply call with a selected_editable_objects override. Re-prove the export-preset-axis falsifier. Consider a grep check for selected_objects=[ inside temp_override near transform_apply.

Done when

All four locations match the snippet contract; smoke passes on 5.2 and 4.5; grep -rn "selected_objects=\[obj\]" skills rules templates examples returns no transform_apply sites.