Allow PDF_PIPELINE_GMAIL_* env fallbacks

Fix PDF uploads: prefer POST over PUT

Trainer worker: add TRAINER_DONE label and stop removing INCOMING

Log build revision at startup

Fix: upload PDF via PUT (API rejects POST)

Remove duplicate PDF upload block in TRAIN handler

Upload PDFs to API after storing

Worker: upload PDF to API after write

Fix TRAIN block + upload PDFs to API

Upload TRAIN PDFs to API space

Fix TRAIN upload block syntax + upload to API

Upload stored PDFs to API space for UI fetch

fix: write Gmail OAuth JSON secrets to /tmp files

fix: restore worker code + entrypoint