chore: scaffold project skeleton (pyproject, Docker, systemd, README)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Dockerfile

@@ -0,0 +1,21 @@
+FROM python:3.11-slim
+
+ENV PYTHONUNBUFFERED=1 \
+    PYTHONDONTWRITEBYTECODE=1 \
+    PIP_NO_CACHE_DIR=1
+
+WORKDIR /app
+
+COPY pyproject.toml README.md ./
+COPY src ./src
+
+RUN pip install --upgrade pip && pip install .
+
+ENV MCAP_DIR=/data/mcap \
+    POLL_INTERVAL_S=30 \
+    LOG_LEVEL=INFO
+
+VOLUME ["/data/mcap"]
+
+ENTRYPOINT ["cosma-log-analyzer"]
+CMD ["serve"]