Closes#121
WORKERS_PER_CORE, TIMEOUT, and GRACEFUL_TIMEOUT were consumed by the
old tiangolo/uvicorn-gunicorn-fastapi base image and are silently
ignored since switching to python:3.12-slim with an explicit uvicorn CMD.
Also applied the same removal to dev (ssh sba-db) and prod (ssh akamai)
docker-compose files directly. Added WEB_WORKERS=4 to prod to override
the Dockerfile default of 2.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>