FRE-4533: Merge apps/{api,web,mobile} and shared-db into ShieldAI repo

- Copy apps/api (Fastify server with spamshield/voiceprint/darkwatch services)
- Copy apps/web (SolidJS web app)
- Copy apps/mobile (SolidJS mobile app)
- Copy packages/shared-db (Prisma schema/models)
- Add apps/* to pnpm-workspace.yaml

packages/shared-db/src/index.ts

@@ -0,0 +1,21 @@
+// Re-export Prisma client
+export { prisma } from './client';
+
+// Export types
+export type {
+  User,
+  Account,
+  Session,
+  FamilyGroup,
+  FamilyGroupMember,
+  Subscription,
+  WatchlistItem,
+  Exposure,
+  Alert,
+  VoiceEnrollment,
+  VoiceAnalysis,
+  SpamFeedback,
+  SpamRule,
+  AuditLog,
+  KPISnapshot,
+} from './client';