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>

frontend/nginx.conf

@@ -0,0 +1,9 @@
+server {
+    listen 3000;
+    root /usr/share/nginx/html;
+    index index.html;
+
+    location / {
+        try_files $uri $uri/ $uri.html /index.html;
+    }
+}