Phase1 skeleton: replace demo main.py with src.server contract

- Overlay ModelHub XC Phase1 (health/status, STRATEGY_ID gate, dry-run)
- Dockerfile CMD -> python -m src.server; FROM stays platform TCR base
- Remove demo main.py and requirements.txt (stdlib only)
- Add tests/, scripts/, docs/, Makefile, config/examples (no secrets)

Dockerfile

@@ -1,14 +1,18 @@
-FROM modelhubxc-4pd.tencentcloudcr.com/xc_agent_platform/python:3.11-slim
-
-ENV PYTHONUNBUFFERED=1
+# ModelHub XC adaptation agent — Phase1 skeleton
+# Default base MUST stay the platform image (do not swap to public mirrors).
+ARG BASE_IMAGE=modelhubxc-4pd.tencentcloudcr.com/xc_agent_platform/python:3.11-slim
+FROM ${BASE_IMAGE}
 
 WORKDIR /app
 
-COPY requirements.txt .
-RUN pip install --no-cache-dir -r requirements.txt
+# Copy only what the runtime needs (see .dockerignore)
+COPY src/ ./src/
 
-COPY . .
+ENV PORT=8080
+ENV PYTHONUNBUFFERED=1
+# STRATEGY_ID and tokens are injected by the platform at run time — never bake them in.
 
 EXPOSE 8080
 
-CMD ["python", "main.py"]
+# Start HTTP service only (no register / submit side effects)
+CMD ["python", "-m", "src.server"]