feat: initial TrustOS platform scaffold

- FastAPI backend: auth, findings, dashboard, attack paths, footprint, AI translator, risk calculator, PDF report generator
- Next.js frontend: Vault dashboard, login, findings table, finding detail with AI coach, digital footprint, reports
- PostgreSQL data model: tenants, users, assets, findings, risk scores, audit reports, attack paths
- Docker Compose + Dockerfiles for all services
- Demo seed data: Acme Corp with 6 findings and 90-day risk score history
- AI Risk Translator (OpenAI/Anthropic) with plain-English business impact
- Role-based access: executive / it_admin / trustos_admin
- Scope-lock engine: authorization required before any assessment

Stage 1-8 complete: Phase 1 Vault Audit product ready

infra/Dockerfile.backend

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+FROM python:3.10-slim
+
+WORKDIR /app
+
+RUN apt-get update && apt-get install -y \
+    libpango-1.0-0 libpangoft2-1.0-0 libpangocairo-1.0-0 \
+    libcairo2 libglib2.0-0 libharfbuzz0b libfontconfig1 \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY . .
+
+EXPOSE 8000
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]

infra/Dockerfile.frontend

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+FROM node:20-alpine
+
+WORKDIR /app
+
+COPY package*.json ./
+RUN npm ci
+
+COPY . .
+
+EXPOSE 3000
+CMD ["npm", "run", "dev"]

infra/docker-compose.yml

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+services:
+  postgres:
+    image: postgres:16-alpine
+    container_name: trustos_postgres
+    environment:
+      POSTGRES_USER: trustos
+      POSTGRES_PASSWORD: trustos_dev
+      POSTGRES_DB: trustos
+    ports:
+      - "5432:5432"
+    volumes:
+      - pgdata:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U trustos -d trustos"]
+      interval: 5s
+      timeout: 5s
+      retries: 10
+
+  backend:
+    build:
+      context: ../backend
+      dockerfile: ../infra/Dockerfile.backend
+    container_name: trustos_backend
+    env_file:
+      - ../backend/.env
+    environment:
+      DATABASE_URL: postgresql+asyncpg://trustos:trustos_dev@postgres:5432/trustos
+      SYNC_DATABASE_URL: postgresql://trustos:trustos_dev@postgres:5432/trustos
+      STORAGE_PATH: /app/storage
+    ports:
+      - "8000:8000"
+    volumes:
+      - ../backend:/app
+      - storage:/app/storage
+    depends_on:
+      postgres:
+        condition: service_healthy
+    command: uvicorn app.main:app --host 0.0.0.0 --port 8000 --reload
+
+  frontend:
+    build:
+      context: ../frontend
+      dockerfile: ../infra/Dockerfile.frontend
+    container_name: trustos_frontend
+    environment:
+      NEXT_PUBLIC_API_URL: http://localhost:8000
+    ports:
+      - "3000:3000"
+    volumes:
+      - ../frontend:/app
+      - /app/node_modules
+      - /app/.next
+    depends_on:
+      - backend
+    command: npm run dev
+
+volumes:
+  pgdata:
+  storage: