feat(dashboard): rebuild SOC dashboard + fix ClickHouse SQL

Complete rewrite of the SOC dashboard using FastAPI + Jinja2 + htmx + Chart.js + Tailwind CSS.
Replaces the old React/Vite frontend with server-rendered templates.

Dashboard pages:
- Overview: KPIs, timeline chart, threat distribution, top IPs
- Detections: paginated/filterable anomaly table
- Scores: ml_all_scores with AE error & XGB prob columns
- Traffic: HTTP logs with method/host filters
- IP Investigation: full deep-dive (scores, features, HTTP logs, classify)
- Classification: SOC feedback form + history
- Features: AI + thesis feature stats
- Models: scoring stats + model metadata

API: 9 JSON endpoints with parameterized queries, sort whitelists

SQL fixes:
- 05_aggregation_tables: add deduplicate_merge_projection_mode
- 11_views: fix nested aggregate (argMax inside sum)
- 12_thesis_features: remove invalid 'let' bindings, fix groupArrayIf type

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

services/dashboard/Dockerfile

@@ -1,22 +1,10 @@
-FROM node:20-alpine AS frontend-builder
-WORKDIR /app/frontend
-COPY services/dashboard/frontend/package*.json ./
-RUN npm install
-COPY services/dashboard/frontend/ ./
-RUN npm run build
-
-FROM python:3.11-slim AS backend
-WORKDIR /app
-COPY shared/python/ja4_common/ /app/shared/ja4_common/
-RUN pip install --no-cache-dir /app/shared/ja4_common/
-COPY services/dashboard/requirements.txt .
-RUN pip install --no-cache-dir -r requirements.txt
-COPY services/dashboard/backend/ ./backend/
-
 FROM python:3.11-slim
 WORKDIR /app
-COPY --from=backend /usr/local/lib/python3.11/site-packages /usr/local/lib/python3.11/site-packages
-COPY --from=backend /app/backend ./backend
-COPY --from=frontend-builder /app/frontend/dist ./frontend/dist
+
+COPY services/dashboard/requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY services/dashboard/backend/ ./backend/
+
 EXPOSE 8000
 CMD ["python", "-m", "uvicorn", "backend.main:app", "--host", "0.0.0.0", "--port", "8000"]