Initial commit: SIEM Toolkit for SentinelOne

Dockerized SecOps toolkit with:
- Coverage Map: STAR rule vs SDL parser field coverage analysis
- Ingest Dashboard: PowerQuery-powered event volume and source breakdown
- Onboarding Assistant: AI-guided log source onboarding with Claude
- Parser management via SDL MCP integration

Stack: FastAPI + PostgreSQL backend, nginx-served HTML frontend, Docker Compose.
PowerQuery runs via Scalyr XDR API (SDL_XDR_URL + SDL_LOG_READ_KEY).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/Dockerfile

@@ -0,0 +1,10 @@
+FROM python:3.12-slim
+
+WORKDIR /app
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY . .
+
+CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000", "--reload"]