debug: real /api/sftp-test with socket+paramiko timeouts

debug: add /api/sftp-test

cleanup: remove dead code after /api/pdf return

fix: make /api/pdf serve from SFTP with timeout

fix: add SFTP timeouts + prevent /api/pdf hang

fix: remove bogus SFTPStore import

fix: dockerize api space (deps + uvicorn entrypoint)

api: serve pdfs from SFTP for trainer UI

api: add SFTP download helper

deps: add paramiko for SFTP pdf fetch

fix: proper empty 204 response for jobs/next

SFTP: serve PDFs + store configs in /inserio

phase2: add worker job queue endpoints

refactor: clean API, lazy-load worker deps

refactor: lazy-load GmailClient to decouple API startup

fix: add google api client dependencies

integrate real backend api

fix: include requirements.txt for docker build

add minimal api entrypoint

deploy: initial API to HF

initial commit