FRE-4529: Transfer ShieldAI code from FrenoCorp repo

Transferred ShieldAI-related files mistakenly placed in ~/code/FrenoCorp:
- Services: spamshield (feature-flags, audit-logger, error-handler), voiceprint (config, service, feature-flags), darkwatch (pipeline, scan, scheduler, watchlist, webhook)
- Packages: shared-analytics, shared-auth, shared-ui, shared-utils (new); shared-billing, jobs supplemented with unique FC files
- Server: alerts (FC version newer), routes (spamshield, darkwatch, voiceprint)
- Config: turbo.json, tsconfig.base.json, vite/vitest configs, drizzle, Dockerfile
- VoicePrint ML service
- Examples

Pending: apps/{api,web,mobile}/ structured merge, shared-db/db mapping

Co-Authored-By: Paperclip <noreply@paperclip.ing>

docker-compose.yml

@@ -1,31 +1,53 @@
-version: '3.9'
+version: '3.8'
 
 services:
   postgres:
-    image: postgres:16-alpine
+    image: postgres:15-alpine
+    container_name: shieldsai_postgres
     environment:
-      POSTGRES_DB: shieldai
-      POSTGRES_USER: shieldai
-      POSTGRES_PASSWORD: shieldai_dev
+      POSTGRES_USER: postgres
+      POSTGRES_PASSWORD: postgres
+      POSTGRES_DB: shieldsai_dev
     ports:
       - "5432:5432"
     volumes:
-      - pgdata:/var/lib/postgresql/data
+      - postgres_data:/var/lib/postgresql/data
     healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U shieldai"]
+      test: ["CMD-SHELL", "pg_isready -U postgres"]
       interval: 5s
       timeout: 5s
       retries: 5
 
   redis:
     image: redis:7-alpine
+    container_name: shieldsai_redis
     ports:
       - "6379:6379"
+    volumes:
+      - redis_data:/data
     healthcheck:
       test: ["CMD", "redis-cli", "ping"]
       interval: 5s
       timeout: 5s
       retries: 5
 
+  mailhog:
+    image: mailhog/mailhog:latest
+    container_name: shieldsai_mailhog
+    ports:
+      - "1025:1025"  # SMTP
+      - "8025:8025"  # Web UI
+    depends_on:
+      - postgres
+
+  adminer:
+    image: adminer:4
+    container_name: shieldsai_adminer
+    ports:
+      - "8080:8080"
+    depends_on:
+      - postgres
+
 volumes:
-  pgdata:
+  postgres_data:
+  redis_data: