chore(infra): add Dockerfile, dependencies, and build config

Dockerfile:
- Base: python:3.11-slim (matches HF Spaces docker runtime)
- Installs gcc for native extension builds
- Copies requirements.txt first for Docker layer caching
- EXPOSE 7860 (required by HuggingFace Spaces)
- HEALTHCHECK via urllib (no extra deps needed)
- CMD: uvicorn server.app:app --host 0.0.0.0 --port 7860

requirements.txt: fastapi, uvicorn[standard], pydantic, openai,
pyyaml, requests, openenv-core (pinned versions for reproducibility)

pyproject.toml:
- [project.scripts] server = 'server.app:main' (required by openenv validate)
- openenv-core>=0.2.0 as runtime dependency

uv.lock: generated by uv lock, required by openenv validate check

Dockerfile

@@ -0,0 +1,19 @@
+FROM python:3.11-slim
+
+WORKDIR /app
+
+RUN apt-get update && apt-get install -y \
+    gcc \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY . .
+
+EXPOSE 7860
+
+HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
+    CMD python -c "import urllib.request; urllib.request.urlopen('http://localhost:7860/')" || exit 1
+
+CMD ["uvicorn", "server.app:app", "--host", "0.0.0.0", "--port", "7860"]

pyproject.toml

@@ -0,0 +1,32 @@
+[build-system]
+requires = ["setuptools>=68.0", "wheel"]
+build-backend = "setuptools.backends.legacy:build"
+
+[project]
+name = "sql-optim-env"
+version = "1.0.0"
+description = "OpenEnv-compliant RL environment for AI SQL query optimization agents."
+readme = "README.md"
+requires-python = ">=3.10"
+license = { text = "Apache-2.0" }
+keywords = ["openenv", "sql", "database", "optimization", "rl", "reinforcement-learning", "llm-agent"]
+
+dependencies = [
+    "fastapi==0.115.0",
+    "uvicorn[standard]==0.30.6",
+    "pydantic==2.8.2",
+    "openai>=1.0.0",
+    "pyyaml==6.0.2",
+    "requests==2.32.3",
+    "openenv-core>=0.2.0",
+]
+
+[project.scripts]
+server = "server.app:main"
+
+[project.optional-dependencies]
+dev = ["pytest", "httpx"]
+
+[tool.setuptools.packages.find]
+where = ["."]
+include = ["*"]

requirements.txt

@@ -0,0 +1,7 @@
+fastapi==0.115.0
+uvicorn[standard]==0.30.6
+pydantic==2.8.2
+openai>=1.0.0
+pyyaml==6.0.2
+requests==2.32.3
+openenv-core>=0.2.0