Operators can now see which MEDIA path was dropped and why, generated
artifacts under the canonical ~/.hermes/cache/{images,...} layout deliver,
and a crafted ~\x00 path no longer aborts the whole attachment batch.
- MEDIA_DELIVERY_SAFE_ROOTS: add canonical cache/{images,audio,videos,
documents,screenshots} alongside the legacy *_cache dirs (#31733).
- filter_media/local_delivery_paths: log the rejected path (was a blind
"outside allowed roots") via _log_safe_path, which strips control chars
and Unicode line separators so a model-emitted path can't forge a log line.
- validate_media_delivery_path + extract_media: guard os.path.expanduser
so a ~\x00 path returns None / is skipped instead of raising and dropping
every other attachment in the response.
Salvaged and slimmed from #33251 (780 LOC -> 35): the reason-tag taxonomy,
the parts-eliding redactor, and the extension-partition hoist are dropped in
favor of logging the path directly. All three findings were verified and
reproduced by the contributor.
Co-authored-by: wysie <wysie@users.noreply.github.com>
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