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>

Dockerfile

@@ -0,0 +1,38 @@
+# Build stage
+FROM node:18-alpine AS builder
+
+WORKDIR /app
+
+# Copy package files
+COPY package*.json ./
+COPY apps/ ./apps/
+COPY packages/ ./packages/
+
+# Install dependencies
+RUN npm ci
+
+# Build all packages
+RUN npm run build
+
+# Production stage
+FROM node:18-alpine AS production
+
+WORKDIR /app
+
+# Copy package files
+COPY package*.json ./
+COPY apps/ ./apps/
+COPY packages/ ./packages/
+
+# Copy built artifacts from builder
+COPY --from=builder /app/apps/web/dist ./apps/web/dist
+COPY --from=builder /app/apps/api/dist ./apps/api/dist
+
+# Install production dependencies only
+RUN npm ci --production
+
+# Expose port
+EXPOSE 3000
+
+# Start the API server
+CMD ["node", "apps/api/dist/index.js"]