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>

services/darkwatch/src/index.ts

@@ -1,7 +1,5 @@
-export * from "./watchlist/WatchListService";
-export * from "./hibp/HIBPService";
-export * from "./matching/MatchingEngine";
-export * from "./alerts/AlertPipeline";
-export * from "./scanner/ScanService";
-export * from "./scheduler/ScanScheduler";
-export * from "./webhooks/WebhookHandler";
+export { watchlistService } from './watchlist.service';
+export { scanService } from './scan.service';
+export { schedulerService } from './scheduler.service';
+export { webhookService } from './webhook.service';
+export { alertPipeline } from './alert.pipeline';