remove ollama/openclaw, full live logs

fix: kaggle sm_75 + pre-built wheel, OpenClaw+Ollama on clean base, no health-check

fix: replace openclaw health-check image with python:3.11-slim, eliminate spurious pauses

fix: move ollama install to start.sh for faster build, prevent Space pause during build

fix: add zstd for ollama install

fix: add USER root before apt-get in Dockerfile

clean: full pipeline, no secrets in history