Generated image/video output now writes under cache/generated/images|videos
instead of the swept inbound caches (cache/images, cache/videos). The hourly
gateway housekeeping deletes 24h-old files in those dirs; for base64-returning
providers the swept file was the only copy, breaking transcript references,
the Artifacts panel and later edits.
Rebased onto current main, where the writers delegate to agent/provider_media,
so the media kind is now the generated/ subpath. cache/generated is added to
tools/credential_files._CACHE_DIRS: without a mount/sync entry the Docker,
SSH and Modal backends never receive the bytes and the provider result loses
agent_visible_image. All callers consume the returned absolute paths, so no
call-site changes were needed; inbound download paths (get_image_cache_dir /
get_video_cache_dir) and the sweeper are untouched.
RED: tests/agent/test_generated_media_durable.py (9 failed on main) — 25h-backdated
generated files deleted by the real cleanup_image_cache / cleanup_video_cache, and
no mount mapping for cache/generated. tests/tools/test_image_generation_artifacts.py
::test_real_generated_image_is_agent_visible_under_ssh_env covers the sandbox
regression with the real writer. Green: 533 passed, 19 skipped.
Co-authored-by: Froraut <79215537+Froraut@users.noreply.github.com>
(cherry picked from commit fd23181f22232f66aec7076d6bf0868ed45661f2)
823385e5cb