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/client.ts

@@ -0,0 +1,50 @@
+import { PrismaClient } from '@prisma/client';
+
+// Singleton pattern for Prisma Client
+const globalForPrisma = globalThis as unknown as {
+  prisma: PrismaClient | undefined;
+};
+
+export const prisma =
+  globalForPrisma.prisma ??
+  new PrismaClient({
+    log: process.env.NODE_ENV === 'development' ? ['query', 'error', 'warn'] : ['error'],
+  });
+
+if (process.env.NODE_ENV === 'development') {
+  globalForPrisma.prisma = prisma;
+}
+
+// Export types from generated client
+export type {
+  User,
+  Account,
+  Session,
+  FamilyGroup,
+  FamilyGroupMember,
+  Subscription,
+  WatchlistItem,
+  Exposure,
+  Alert,
+  VoiceEnrollment,
+  VoiceAnalysis,
+  SpamFeedback,
+  SpamRule,
+  AuditLog,
+  KPISnapshot,
+  UserRole,
+  FamilyMemberRole,
+  SubscriptionTier,
+  SubscriptionStatus,
+  WatchlistType,
+  ExposureSource,
+  ExposureSeverity,
+  AlertType,
+  AlertSeverity,
+  AlertChannel,
+  FeedbackType,
+  RuleType,
+  RuleAction,
+} from '@prisma/client';
+
+export * as PrismaModels from '@prisma/client';

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';