Consolidate @shieldai/db and @shieldsai/shared-db packages (FRE-4603)

- Merged singleton pattern + type exports from shared-db
- Kept FieldEncryptionService from original db package
- Upgraded to Prisma v6.2.0 (newer version)
- Adopted shared-db's complete schema for multi-service platform
- Updated 17 consumer imports across darkwatch, voiceprint, jobs, api
- Standardized on @shieldai/db namespace

Files changed:
- packages/db/package.json (v0.1.0 → v0.2.0)
- packages/db/src/index.ts (consolidated exports)
- packages/db/prisma/schema.prisma (merged schema)
- packages/db/prisma/seed.ts (updated for new schema)
- 17 consumer files updated

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

packages/api/src/__tests__/sms-classifier-race-condition.test.ts

@@ -2,7 +2,7 @@ import { describe, it, expect, beforeEach, vi } from 'vitest';
 import { SMSClassifierService } from '../services/spamshield/spamshield.service';
 
 // Mock shared-db before anything else (Prisma client is not generated in test env)
-vi.mock('@shieldsai/shared-db', () => ({
+vi.mock('@shieldai/db', () => ({
   prisma: {},
   SpamFeedback: {},
 }));

packages/api/src/routes/darkwatch.routes.ts

@@ -1,5 +1,5 @@
 import { FastifyInstance, FastifyRequest, FastifyReply } from 'fastify';
-import { prisma, SubscriptionTier } from '@shieldsai/shared-db';
+import { prisma, SubscriptionTier } from '@shieldai/db';
 import { tierConfig, SubscriptionTier as BillingTier } from '@shieldsai/shared-billing';
 import {
   watchlistService,

packages/api/src/services/darkwatch/alert.pipeline.ts

@@ -1,4 +1,4 @@
-import { prisma, AlertType, AlertSeverity } from '@shieldsai/shared-db';
+import { prisma, AlertType, AlertSeverity } from '@shieldai/db';
 import {
   NotificationService,
   NotificationPriority,

packages/api/src/services/darkwatch/scan.service.ts

@@ -1,4 +1,4 @@
-import { prisma, ExposureSource, ExposureSeverity, WatchlistType } from '@shieldsai/shared-db';
+import { prisma, ExposureSource, ExposureSeverity, WatchlistType } from '@shieldai/db';
 import { createHash } from 'crypto';
 
 function hashIdentifier(identifier: string): string {

packages/api/src/services/darkwatch/scheduler.service.ts

@@ -1,4 +1,4 @@
-import { prisma, SubscriptionTier, SubscriptionStatus } from '@shieldsai/shared-db';
+import { prisma, SubscriptionTier, SubscriptionStatus } from '@shieldai/db';
 import { tierConfig } from '@shieldsai/shared-billing';
 import { darkwatchScanQueue } from '@shieldsai/jobs';
 import { randomUUID } from 'crypto';

packages/api/src/services/darkwatch/watchlist.service.ts

@@ -1,4 +1,4 @@
-import { prisma, WatchlistType } from '@shieldsai/shared-db';
+import { prisma, WatchlistType } from '@shieldai/db';
 import { createHash } from 'crypto';
 
 export function normalizeValue(type: WatchlistType, value: string): string {

packages/api/src/services/darkwatch/webhook.service.ts

@@ -1,4 +1,4 @@
-import { prisma, ExposureSource, ExposureSeverity, WatchlistType, AlertType, AlertSeverity } from '@shieldsai/shared-db';
+import { prisma, ExposureSource, ExposureSeverity, WatchlistType, AlertType, AlertSeverity } from '@shieldai/db';
 import { createHash } from 'crypto';
 import { mixpanelService, EventType } from '@shieldsai/shared-analytics';
 

packages/api/src/services/spamshield/spamshield.service.ts

@@ -1,4 +1,4 @@
-import { prisma, SpamFeedback } from '@shieldsai/shared-db';
+import { prisma, SpamFeedback } from '@shieldai/db';
 import { spamShieldEnv, SpamDecision, spamFeatureFlags, defaultScores, metadataLimits } from './spamshield.config';
 import { createHash } from 'crypto';
 import { spamAuditLogger, hashPhoneNumber } from './spamshield.audit-logger';

packages/api/src/services/voiceprint/voiceprint.service.ts

@@ -1,4 +1,4 @@
-import { prisma, VoiceEnrollment, VoiceAnalysis } from '@shieldsai/shared-db';
+import { prisma, VoiceEnrollment, VoiceAnalysis } from '@shieldai/db';
 import {
   voicePrintEnv,
   AnalysisJobStatus,