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

backend/app/core/config.py

@@ -0,0 +1,37 @@
+from pydantic_settings import BaseSettings
+from pydantic import field_validator
+from typing import Optional
+
+
+class Settings(BaseSettings):
+    PROJECT_NAME: str = "TrustOS"
+    VERSION: str = "0.1.0"
+    API_V1_STR: str = "/api/v1"
+
+    DATABASE_URL: str = "postgresql+asyncpg://trustos:trustos_dev@localhost:5432/trustos"
+    SYNC_DATABASE_URL: str = "postgresql://trustos:trustos_dev@localhost:5432/trustos"
+
+    SECRET_KEY: str = "dev-secret-key-change-in-production"
+    ALGORITHM: str = "HS256"
+    ACCESS_TOKEN_EXPIRE_MINUTES: int = 480
+
+    AI_PROVIDER: str = "openai"
+    OPENAI_API_KEY: Optional[str] = None
+    ANTHROPIC_API_KEY: Optional[str] = None
+
+    HIBP_API_KEY: Optional[str] = None
+    NVD_API_KEY: Optional[str] = None
+
+    STORAGE_PATH: str = "/app/storage"
+
+    SMTP_HOST: Optional[str] = None
+    SMTP_PORT: int = 587
+    SMTP_USER: Optional[str] = None
+    SMTP_PASS: Optional[str] = None
+
+    class Config:
+        env_file = ".env"
+        case_sensitive = True
+
+
+settings = Settings()