feat: clone OpenSIN-Code repo at runtime if missing

fix: add execute permission for start.sh to prevent runtime crash

fix: use start.sh as ENTRYPOINT to configure env

run: use python -m uvicorn

fix: use uvicorn directly

triggers: factory rebuild

fix: use curl with retry for opencode download

fix: robust Dockerfile with retries

build: add .dockerignore to reduce context

fix: normalize COPY instruction for stable builds

Deploy via automated script [skip ci]