- Diffusion dataset upload now streams each file into a sibling temp file and
atomically os.replace()s it into place only after the whole file is written and
within the size cap. A mid-batch 413 (or any abort) removes the temp, never an
example already stored under the same name, so re-uploading a too-large batch can
no longer truncate or delete a previously uploaded image.
- _diffusion_dataset_summary counts an image as captioned only when it resolves to a
non-empty caption via the same sidecar-over-metadata precedence the trainer uses. An
empty (tombstone) sidecar shadows a metadata row and makes the trainer skip the
image, so counting it over-reported caption_count and mislabeled an effectively
uncaptioned dataset as captioned.
- uninstall.sh/.ps1 now remove a custom/env-mode Studio's native diffusion build that
installs beside the root as a stable-diffusion.cpp sibling (find_sd_cpp_binary
resolves it from the Studio home's parent), guarded by the same unsafe-path check,
and stop processes locking the default-mode stable-diffusion.cpp before removing it.
Adds regression tests for the upload data-loss and caption-count paths and a hermetic
shell test for the custom-root stable-diffusion.cpp removal.
