Two changes to the RAG captioning log output:
- Drop the noisy per-image and path-selection info lines
(using-chat-VLM, loading-helper, per-image done). Only the
'caption_images: invoked' and 'caption_images: complete' lines
remain; warnings for genuine failures (helper load, per-image
request, helper unload) are kept.
- Configure structlog at the top of the ingestion subprocess worker
with the same env the parent uses. The worker runs in a spawned
process where structlog was never set up, so its logs fell back to
structlog's dev ConsoleRenderer ([info] ...) instead of the JSON
renderer the rest of the app uses. Now captioner/parser logs from
the subprocess match the parent's JSON format.
290201f62e