feat: initial project setup

Dockerfile

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+FROM python:3.12-slim
+
+WORKDIR /app
+
+# Install uv
+COPY --from=ghcr.io/astral-sh/uv:latest /uv /usr/local/bin/uv
+
+# Install dependencies before copying full source (layer caching)
+COPY pyproject.toml uv.lock* ./
+RUN uv sync --frozen --no-dev 2>/dev/null || uv sync --no-dev
+
+# Copy application source
+COPY . .
+
+# Make the venv's binaries available on PATH
+ENV PATH="/app/.venv/bin:$PATH"
+ENV DAGSTER_HOME=/app/dagster_home